Answer:
nanoparticle cancer drugs could act like biological missiles that destroy tumors while minimizing damage to healthy organs
Why would tobacco companies start adding ammonium salts to cigarettes?
Answer:
The tobacco industry has for many years used ammonia as a relatively innocuous additive to augment certain flavors, to economize on costs by expanding or “puffing” the cured leaf, to denicotinize (reduce the amount of nicotine in) tobacco, and even to reduce some of the carcinogens in tobacco smoke.
a block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm
A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm, the density of lead is mathematically given as
x= 11.30 g/cm^3
This is further explained below.
What is the density of lead?Generally, in order to determine the lead's specific gravity; To begin, we would use the formula to find out how much space the block of lead takes up;
Volume= length * width * height
After plugging the values into the formula, we get the following:
Volume = 4.50 * 5.20 * 6.00
Volume = 140.4 cm^3
The next thing that we do is determine the density of lead;
After plugging the values into the formula, we get the following:
X = 11.30 g/cm^3
In conclusion, the density of lead is 11.30 g/cm^3
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CQ
A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. The block weighs 1587 g. From this information, calculate the density of lead.
Check all the boxes that describe the electron sea model.
It is the simplest metal bonding model.
It is the most complicated metal bonding model.
Metallic bonding results from the transfer of valence electrons.
Metallic bonding results from the sharing of valence electrons.
The electrons are delocalized.
The electrons are attracted to specific nuclei.
The delocalized electrons serve as the glue that keeps the metal atoms together.
The electrons that are attracted to specific nuclei serve as the glue that keeps the metal atoms together.
The true statements about the electron sea model is;
It is the simplest metal bonding model.The electrons are delocalized.The delocalized electrons serve as the glue that keeps the metal atoms together.What is the electron sea model?The term bonding has to do with the situation in which there is a combination of the atoms that come from two or more elements. Now let us note that formation of a bond means that the properties of the elements would cease to be individually observed once a bond has been formed.
Having said this, let us talk about the metallic bond. The metallic bond is the kind of bond that occur between the positive ions of the metal and the electron cloud or sea that have left the ions. It then follows that the bond is formed by the electrostatic interference that occurs between the electron sea and the positive ions.
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A tank is filled with 300 g of ozone (O3(g)) at -58.75oC. The pressure inside the tank is 6250 kPa.
Calculate the volume (in L) of the tank.
The volume of gas in the tank is determined as 1.78 L.
What is the volume of gas in the tank?The volume of gas in the tank is calculated by applying idle gas law as follows;
PV = nRT
where;
n is the number of moles of the gasP is the pressure of the gasV is the volume of the gasR is ideal gas constant = 8.314 L.kPa/mol.KT is temperature of the gas = -58.75⁰C = 214.25 Kn = reacting mass / molar mass
n = (300 g) / (3 x 16 g)
n = (300 g) / (48 g/mol)
n = 6.25 moles
The volume of the gas is calculated as follows;
V = nRT/P
V = (6.25 x 8.314 x 214.25)/(6250)
V = 1.78 L
Thus, the volume of ideal gas increases with increase in temperature.
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How would you calculate the number of barium atoms present in two moles of barium?
A) Multiply the atoms of barium by Avogadro's number.
B) Multiply the moles of barium by Avogadro's number.
C) Divide the moles of barium by Avogadro's number.
D) Add Avogadro's number to the number of atoms.
To calculate the number of barium atoms present in two moles of barium, we need to multiply the moles of barium by Avogadro's number (B)
A mole of a compound contains 6.022 x [tex]10^{23}[/tex] atoms.
6.022 x [tex]10^{23}[/tex] atoms is the Avogadro’s number which denotes the molecular weight in grams.
Thus, one mole of barium would have 6.022 x [tex]10^{23}[/tex] barium atoms
Therefore, two moles of barium would be multiplication of number of moles of barium by Avogadro’s number
Two moles of barium = 2 * 6.022 * [tex]10^{23}[/tex] = 12.044 * [tex]10^{23}[/tex]
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your friend is studying a specific exergonic reaction. your friend hypothesizes that the addition of enzyme x will reduce the δg of this reaction, thus allowing it to proceed spontaneously. what do you think of your friend's hypothesis?
An enzyme do not change delta G.
What is exergenic reaction?1)A reaction that releases free energy is known as an exergonic reaction. This type of reaction can happen spontaneously, unaffected by external forces, because it releases energy rather than absorbing it.
2) Exergonic reactions are those in chemistry where the change in free energy is negative. A system's total amount of available energy is measured by its free energy; negative changes indicate that energy has been released, whilst positive changes indicate that energy has been stored.
Enzyme only changes activation energy .Enzyme do not change delta G so, this hypothesis does not fit with what is know about the reaction.
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Rowan is at an all-you-can-eat breakfast. He has a pancake on his plate and is going to put another pancake on top of it. Which one of these other pancakes would make the bottom pancake the warmest? Explain how the energy and temperature of both the bottom pancake and your chosen top pancake will change after they’ve been touching for a while, and why.
Pancakes are warmth due to conduction. When there is conduction in a system, there is change in temperature and energy.
When a system absorbs or loses warmth, the common kinetic energy of the molecules will exchange. Consequently, warmth transfer effects in a change inside the machine's temperature so long as the machine is not undergoing a segment trade.
The change within the inner power of a gadget is the sum of the heat transferred and the paintings carried out. The heat glide is same to the exchange within the inner energy of the device plus the work performed.
When the temperature of an object will increase, the average kinetic energy of its particles increases. When the average kinetic power of its debris will increase, the object's thermal energy increases. consequently, the thermal energy of an object will increase as its temperature increases.
Inner strength is the whole kinetic energy and capacity power of all the particles, atoms and molecules that make up a system. Heating adjustments the energy stored within the system by growing the strength of the debris that make up the system.
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After energy from food molecules has been extracted to make atp, electrons are transferred to a final acceptor. When the final electron acceptor is an organic molecule, the process is termed?.
Answer: fermentation
Explanation:
the activity of the enzyme used for the synthesis of oxaloacetate from pyruvate and co2 is increased by which acts as an allosteric activator. rubp acetyl coa rubisco g3p 3pg
The activity of the enzyme used for the synthesis of oxaloacetate from pyruvate and carbon dioxide is increased by acetyl-coenzyme A which acts as an allosteric activator.
After glycolysis, pyruvate is changed over into acetyl-coenzyme A in arrange to enter the citric corrosive cycle.
Oxaloacetate synthesis from pyruvate is a vital anaplerotic response that makes oxaloacetate from pyruvate. The protein could be a mitochondrial protein containing a biotin prosthetic gather, requiring magnesium or manganese and acetyl-coenzyme A.
Pyruvate carboxylase could be a biotin-containing enzyme that catalyzes the arrangement of oxaloacetate within the nearness of an allosteric activator, acetyl-coenzyme A, from pyruvate.
Furthermore, small pyruvate is decarboxylated to acetyl-coenzyme A by the pyruvate dehydrogenase complex. Or maybe, pyruvate is changed over to the 4-carbon oxaloacetate by pyruvate carboxylase.
This switch happens fundamentally in reaction to an increment in free fatty acids oxidation. Free fatty acids from adipocytes are promptly oxidized within the liver.
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what is the path of a rock that begins in magma and ends in sedimentary rocks
Answer:The path of a rock that begins in magma and ends in sedimentary rocks is called the rock cycle.
Explanation:Did this a while ago.Hope i helped :)
In a separate location, take notes from the sources you’ve identified. These notes will provide details for your research paper. While reading and taking notes, use these reading strategies to analyze texts and websites.
Explanation:
External force of 220 applied on a pistan of a cylinder containg 1.25 ammonia gas move 10cm as shown in diagram below
each of the reactants i nreaction a is a single sugar molecule also called a monosaccharide. what prefix before saccharide would you use to describe surcrose
In A, two types of molecules are generated. Two monosaccharides are bonded together by a condensation reaction in which glycoside bonds form between the monosaccharides and release the water molecule. In a specific, A reaction, fructose, and glucose molecules combine to generate sucrose (disaccharide).
In the case of the B reaction, two distinct amino acids (monomers) combine to generate a third molecule, a dipeptide; the bond formed between these two molecules is known as a peptide bond (amine group of first amino and cool group of second amino acid). This reaction is also condensation and results in the formation of water molecules. The fact that both create water molecules and dimers from two monomers is shared in this region.
Monosaccharides (from Greek monos: single, saccharin: sugar) are the most fundamental molecules (monomers) from which all carbohydrates are formed.
They are typically water-soluble white crystalline solids. Despite their name, only a few monosaccharides have a sweet flavor (sugars).
Sucrose, the most common table sugar, is a disaccharide made up of one molecule of each of the two monosaccharides D-glucose and D-fructose.
Monosaccharides include glucose (dextrose), fructose (levulose), and galactose.
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^20 10 Ne is an isotope of neon. How many protons does it have? How many neutrons? How many valence electrons? [Separate your answers with a space, as in 4 5 2.]
An isotope of neon with formula 20/10 Ne will possess 10 protons, 10 neutrons and 8 valence electrons i.e. 10, 10, 8.
What is an isotope?Isotopes are two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. Thus, isotopes have the same atomic number but a different mass number.
According to this question, an isotope of neon, an inert gas, has a formula of 20/10 Ne. The mass number of this isotope is 20 while the atomic number is 10.
This means that the number of neutrons is 20 - 10 = 10 while the number of protons is 10. Neon like all other noble gas has a filled shell and a valence electron of 8.
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find the molecular formula of the alkane represented in the mass spectrum. a mass spectrum. the peak at mass 100 has an 8% relative abundance. the peak with mass 85 has a 40% abundance. the peak at 71 has a 3% abundance. the peak at 57 has a 30% abundance. the peak at mass 43 has a 100% abundance. the peak at mass 29 has an 18% abundance. molecular formula: c {n}h {x} cnhx
Answer: the molecular altatude of the supercalifragilistic gene should expand by 100%,
L
L
L
L
L
L
L
L
L
L
L
Explanation:
Magnesium reacts with bromine to form magnesium bromide. When
1.2 g of magnesium reacts with 2.0 g of bromine, which is the limiting
reagent and what mass of magnesium bromide is formed?
Mg + Br2 → MgBr2
A student is preparing 0.5 L of a 0.1 M magnesium chloride solution. The student uses the following steps to get started.
Step 1: Gather a graduated cylinder, balance, and stirring rod.
Step 2: Calculate the number of moles of magnesium chloride needed.
Step 3: Add the water to reach 0.5 L of magnesium chloride solution and stir until dissolved.
Step 4: Label the solution 0.1 M MgCl2.
The process as described is incomplete. What would fix the process so that it is accurate?
A) The student made a mistake in Step 3 by adding enough water to reach 0.5 L of water. Exactly 0.5 L of water should have been added.
B) The student made a mistake in Step 1 by getting a graduated cylinder. The student should have gotten a beaker.
C) The student made a mistake in Step 4 by labeling the solution 0.1 M MgCl2. It should be 0.1 g MgCl2.
D) The student made a mistake in Step 2 by calculating the moles of magnesium chloride. The grams should be measured to make the solution.
The student made a mistake in Step 2 by calculating the moles of magnesium chloride. The grams should be measured to make the solution.
How do you prepare a solution?In preparing a solution of a solid, we would need to follow a number of steps so that the desired concentration of the solution is what we would end up having.
The steps to be followed are;
1) Gather a graduated cylinder, balance, and stirring rod.
2) Calculate the mass of magnesium chloride needed.
3) Add the water to reach 0.5 L of magnesium chloride solution and stir until dissolved.
4) Label the solution 0.1 M MgCl2.
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Please help with the table on the picture!!
From the given table of ionic compounds:
Formula of compound: FeSO₄ (aq)
Cation formula : Fe²⁺
Number of moles of cation : 1
Anion formula : SO₄²⁻
Number of moles of anion: 1
Formula of compound: (NH₄)₂SO₄ (aq)
Cation formula : NH₄⁺
Number of moles of cation : 2
Anion formula : SO₄²⁻
Number of moles of anion: 1
Formula of compound: Pb(NO₃)₂ (aq)
Cation formula : Pb²⁺
Number of moles of cation : 1
Anion formula : NO₃⁻
Number of moles of anion: 2
Formula of compound: K₃PO₄ (aq)
Cation formula : K⁺
Number of moles of cation : 3
Anion formula : PO³⁻
Number of moles of anion: 1
Formula of compound: Fe₂(SO₄)₃ (aq)
Cation formula : Fe³⁺
Number of moles of cation : 2
Anion formula : SO₄²⁻
Number of moles of anion: 3
What are cations and anions?Ions are atoms or groups of atoms that possess an electric charge.
Cations are positively charged ions.
Cations are formed as a result of the loss of electrons.
Metallic elements usually form cations.
Anions are negatively charged ions that are formed as a result of electron gain.
Non-metals usually form anions.
Compounds that are composed of oppositely charged ions are known as ionic compounds.
When ionic composed are dissolved in water or in molten form, the ions are free to move.
The separation of the ions in ionic compounds is known as dissociation.
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The volume of a pond being studied for the effects of acid rain is 35 kiloliters (kL). There are 1,000 liters (L) in 1 kL and 1 Times. 106 microliters (mL) in 1 L.
What is the volume of this pond in microliters?
The volume of a pond being studied for the effects of acid rain that is 35 kiloliters (kL) if converted in microliters is found to be 3.5 x [tex]10^{10}[/tex]
What is acid rain?Acid rain is the actual form of precipitation that includes acidic components like nitric or sulfuric acid that fall from the atmosphere on the earth's surface.
Acid rain refers to rain or any other type of precipitation that is unusually acidic, that is, contains large amounts of hydrogen ions.
The acid rains are considered harmful as they corrode and destroy these infrastructures, and plants and cause irritation to the organisms.
The volume of a pond that is being studied for the effects of acid rain is 35 kiloliters (kL).
There are a total of 1,000 liters (L) in 1 kL and 1 x [tex]10^6\\[/tex] microliters (mL) in 1 L.
Then 35 kL (1,000 L/ 1kL) (1 x 10^6 microliters / 1 L) = 3.5 x [tex]10^{10}[/tex] microliters
The volume of this pond calculated in microliters is 3.5 x [tex]10^{10}[/tex] microliters.
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What piece of equipment can be used to remove a harmful gas from an exhaust stream?
Question 8 options:
Liquid dissolver
Absorption column
Solvent mixer
Heat exchanger
The equipment which can be used to remove a harmful gas from an exhaust stream is known as wet scrubber.
The correct answer choice is option a
What is a wet scrubber?This simply refers to an equipment which is use to harmful gas, liquid or solid substance from an exhaust stream.
When a substance is harmful, it means it can affect living things in different forms. A harmful or toxic gas is very dangerous to our health system. When an exhaust stream contains any toxic substances, the wet scrubbers can be used to remove it
So therefore, wet scrubbers or venti scrubbers can be used to remove harmful gas from an exhaust stream.
Complete question:
What piece of equipment can be used to remove a harmful gas from an exhaust stream?
a. Wet scrubber
b. Liquid dissolver
c. Absorption column
d. Solvent mixer
e. Heat exchanger.
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in addition to acting as a comparison to the post-partition salicylic acid solution, the pre-partition salicylic acid solution (not mixing with chloroform) serves a 2nd propose to:
The pre-partition salicylic acid solution (not mixing with chloroform) serves a second propose to act as a standard for linear regression analysis.
What is salicylic acid?
The chemical formula for salicylic acid is HOC6H4CO2H. It is a colorless, bitter-tasting substance that serves as both an aspirin precursor and metabolite (acetylsalicylic acid). It is a plant hormone that has been classified as an experimental teratogen by the EPA's Toxic Substances Control Act (TSCA) Chemical Substance Inventory. The word for willow tree in Latin is salix. Some anti-acne products contain it as an ingredient. Salicylates are the name for the salts and esters of salicylic acid.
The pre-partition salicylic acid solution (not combining with chloroform) acts as a benchmark for linear regression analysis in addition to serving as a comparison to the post-partition salicylic acid solution.
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suppose you carry out a tlc separation of acetaminophen and phenacetin on silica gel using a nonpolar developing solvent. which should have the higher rf value and why?
Non-volatile mixtures can be separated using a process called thin layer chromatography (TLC). Since acetaminophen has a hydroxyl group, it is more polar than phenacetin.
Does acetaminophen or phenacetin have a lower Rf value?Since acetaminophen has a hydroxyl group, it is more polar than phenacetin. Phenacetin will be more soluble and migrate to the top than the polar component because we are employing a non-polar solvent.
Non-volatile mixtures can be separated using a process called thin layer chromatography. The experiment is carried out on a piece of glass, plastic, or aluminum foil that has been lightly covered with an adsorbent substance. Typically, silica gel, cellulose, or aluminum oxide are utilized as the substance.
Because acetaminophen is more polar than phenacetin and nonpolar molecules pass through silica gel more quickly than polar ones do, acetaminophen would have a lower Rf value.
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the molar heat capacity of silver is 25.35 j/mol⋅∘c . how much energy would it take to raise the temperature of 8.20 g of silver by 17.3 ∘c ? express your answer with the appropriate units.
33.34 J of energy it would take to raise the temperature.
Specific heat = J/g C
(25.35 J/mole C) x (1 mole / 107.8682g) = 0.2350 J/g C
Energy required = (mass in grams)x(Specific heat)x(Temp final - Temp initial)
= (8.20 g)(0.2350 J/g C)(17.3°C) = 33.34 J (units cancel for /g C)
Heat capacity or specific heat is the quantity of heat consistent with unit mass that is required to elevate the temperature with the aid of 1°C. particular warmness is helpful in figuring out the processing temperatures and quantity of warmth vital for processing and may be helpful in differentiating between polymeric composites.
The specific heat capacity (or in reality, the specific heat), that's the heat potential according to unit mass of a material. Experiments show that the transferred heat relies upon on three factors: (1) The change in temperature, (2) the mass of the system, and (3) the substance and phase of the substance.
The specific heat is the quantity of heat energy per unit mass required to elevate the temperature by way of one degree Celsius. The connection between warmth and temperature change is commonly expressed inside the form shown under where c is the unique warmness .
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which components of the atom are found outside of the nucleus? responses electrons electrons neutrons neutrons all are found in the nucleus. all are found in the nucleus. protons
Electrons are the components of the atom that are found outside of the nucleus.
In contrast to protons and neutrons, which are found inside the atom's nucleus, electrons are found outside the nucleus. Negative electrons are drawn to the positive nucleus because their opposing electric charges attract one another. This force of attraction keeps electrons flowing continuously in the otherwise empty area surrounding the nucleus, this force of attraction keeps electrons flowing continuously.
Since they are so tiny, electrons. Since an electron's mass is only a tiny fraction of that of a proton or neutron (approximately 1/2000), it is almost entirely absent from the overall mass of an atom. Electrons have an electric charge of -1, which is equivalent to but in the opposite direction of the proton's electric charge of +1.
Since there are exactly as many electrons in an atom as there are protons, the positive and negative charges "balance out," leaving the atom electrically neutral.
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When a molecule of oxygen moves from outside of a eukaryotic cell to eventually be reduced by complex iv of the electron transport chain, how many phospholipid bilayers does it need to cross?.
The oxygen molecule needs to cross three phospholipid bilayers.
The process of ATP synthesis in which electrons are transported from NADH or FADH2 to oxygen is known as oxidative phosphorylation. The process of cellular respiration ends at this stage. Chemiosmosis and the electron transport chain are two interrelated processes that make up oxidative phosphorylation. As electrons move from one molecule to the next in the electron transport chain, energy is released throughout the process, which is then utilized to create an electrochemical gradient. However, during chemiosmosis, ATP is produced using the energy stored in the gradient.
Oxygen is found at the end of the electron transport chain, where it takes electrons and picks up protons to make water.
Therefore, it follows that a molecule of oxygen must travel through three phospholipid bilayers, which are represented by the cell membrane and the external and internal membranes of the mitochondria, in order for it to go through the electron transport chain.
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explain the realationship between heat and thermal energy
Answer: both are a way of heat
Explanation: see you can see the there is a lot of heat in the oven but like the sun thermal energy is so its heat but it was made naturally
1.
Sir William Ramsey is one scientist credited with identifying the noble gas argon. Sir Ramsey
separated nitrogen gas from the air and reacted it with an excess of magnesium, producing solid
magnesium nitride. However, a small sample of an unreactive gas remained with a density different
from the density of the nitrogen gas. Sir Ramsey identified the unreactive gas as argon and later
went on to discover neon, krypton, and xenon.
State, in terms of valence electrons, why the noble gases that Sir Ramsey discovered have similar
chemical properties.
The noble gases have similar chemical properties because they have the same number of valence electrons.
What are noble gases?The noble gases are the gases that are found in the last group of the periodic table. These are the gases that have been said to be unreactive under normal conditions. Thee have been found to react only under stringent conditions as we can see.
Given the fact that the octet rule states that an element that contains eight electrons in its outermost shell would be unreactive and all the noble gases have complete octets hence the noble gases are unreactive.
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how does temperature affect water movement in oceans?
Click oil basics to explore the natural resources needed for the production of plastics. use the information to answer the question. which of these ingredients is important in making plastics?
The ingredients that is important in making plastics is natural gas plant liquids.
Natural gas liquids (NGLs) are components of natural gas which are separated from the gas state in the form of liquids. They many applications including; plastic production, inputs for petrochemical plants, they are also burned for space heat and cooking, and can also be blended into vehicle fuel.
In the manufacturing of plastics, come components of NGLs are used. And for this case, ethane. Ethane is used in the production of ethylene which are passed through pressure and catalyst to be turned to plastics like polythene.
The reason why they are mostly used in the manufacturing plastics than other resources like crude oil is that it is much cleaner.
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How many atoms are present in 97.34g of zinc?
To discover the number of atoms in a piece, divide its importance in grams by the periodic table's amu atomic mass, then multiply the result by Avogadro's number: 6.02 x 1023.
What is atoms?An atom is a matter particle that defines a chemical element uniquely. An atom is made up of a central nucleus and one or more negatively charged electrons.The nucleus is positively charged and contains one or more heavy particles called protons and neutrons. An atom exists as an essential particle of value that contains at least one proton.Here are a few atom examples: neon (N) and hydrogen (H) (Ne). Because atoms were once thought to be the smallest things in the universe and could not be divided, the term "atom" comes from the Greek word for indivisible.
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What are radicals in chemistry?
In chemistry, the expression radicals is used to denote highly reactive substances that may contain unpaired electrons.
What are chemistry radicals?The expression chemistry radicals indicate the presence of substance that are unstable because they have unpaired electrons that tends to form bonds with other substances. For example, the chlorine molecule may suffer homolysis under UV light and thus generate two radicals of Cl with unpaired electrons.
Therefore, we can conclude that the chemistry radicals are highly unstable molecules that are characterized to have unpaired electrons and therefore are prone to form chemical bonds with other substances.
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