The empirical formula of the compound with 72.0 g of C. 18.0 g of H, and 28.0 g of N is C₃H₉N.
How to calculate empirical formula?Empirical formula of a compound indicates the ratios of the various elements present in a compound, without regard to the actual numbers.
The empirical formula of a compound can be calculated as follows:
C = 72.0g H = 18.0g N = 28.0gFirst, we divide by the atomic mass of each element as follows:
C = 72.0g ÷ 12 = 6molH = 18.0g ÷ 1 = 18 molN = 28.0g ÷ 14 = 2molNext, we divide by the smallest mole as follows:
C = 6mol ÷ 2 = 3
H = 18 mol ÷ 2 = 9
N = 2mol ÷ 2 = 1
The empirical ratio is 3:9:1, hence, it can be said that the empirical formula is as follows: C₃H₉N.
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You need to use your separatory funnel for an extraction, but you notice that there is some residual water in it from when it was washed during the previous lab period. What should you do?.
In this case, rinse the separating funnel with acetone into a garbage container and wash it again with soap and water before using it for the future experiment.
A separatory funnel, also called a separation funnel, separating funnel, or simply a sep funnel, is a piece of lab equipment used in liquid-liquid extractions to partition a mixture's components into two immiscible solvent phases of different densities. separating funnels must be free of pollutants that could lower the extraction's yield. After cleaning and rinsing, the funnel might be put in a desiccation to allow the water on the body to dry before being utilized for the subsequent extraction step. Standard laboratory procedures include washing all laboratory equipment before use, regardless of how clean it is.
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What is the word equation for KCIO4 → KCI + O₂
Answer:
KCIO4 → KCI + 2O2
Explanation:
KCIO4 → KCI + 2O2
Indicate the oxidation state for each of the following:
phosphorus in P₂H₂
carbon in H₂C₂O4
chromium in CrO²-
P2H2 has an oxidation number of +1. In P2H2, the oxidation
number of H is -1
H2C2O4 Oxidation State - Oxalic AcidC has an oxidation number of +3 in H2C2O4. O has an oxidation
number of -2 in H2C2O4. H2C2O4 has an oxidation number of +1.
CrO2 Oxidation State - Chromium(IV) OxideCrO2 has an oxidation number of +4.
Explain oxidation?The oxidation state, also known as the oxidation number, is an atom's hypothetical charge if all of its bonds to other atoms were fully ionic.
The sum of the oxidation states of all the atoms in an ion equals the ion's charge.
A substance's more electronegative element is given a negative oxidation state. The one that is less electronegative is given a positive oxidation state.
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5. The elevation of the Dead Sea is -1,286 feet. (The Dead Sea is below sea level.) Mt.
McKinley has an elevation of 20,320 feet. What is the difference in the elevation between
the Dead Sea and Mt. McKinley?
HELP PLEASE HELP ASAP!!!! 20 points!!! COLLISIONS COVALENT
I don't know how to do this last level for Collisions "Covalent"
It is level 17 updated
The covalent compounds formed from the given elements are as follows:
Water, H₂ONitrogen trifluoride, NF₃Carbon (iv) oxide, CO₂What is the collision theory?The collision theory states that products are formed from reactants molecules only when effective collisions occur.
Effective collisions are those collisions in which the reactant molecules that collide have energy equal to or greater than the activation energy so that product molecules are formed from such collisions.
Considering the covalent molecules that are formed from the effective collision of the given elements:
The given elements that must collide to form products include:
HydrogenCarbonNitrogenOxygenFluorineThe given elements are all non-metals and the will most likely products that will be formed are covenant compounds.
Covalent compounds are compounds that are formed as a reseult of the formation of covalent bonds between elements. Covalent bonds are formed by electron sharing between those whose electronegativity differences are not large.
Therefore, compounds formed between the elements are covalent compounds.
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Find the density in g/cm3 of brass, if 535,000 milligrams occupy a volume of 62.3 cm3.
Answer:
8.59 g/cm3
Explanation:
mass = 535,000 mg = 535,000 x 10^-3 g = 535 g
volume = 62.3 cm3
density = m/V = 535 / 62.3 = 8.58747993579 g/cm3 or 8.59 g/cm3
how many grams (g) of nacl are needed to make a 125 ml of 0.45m nacl solution? answering this question requires 3 steps.
Answer:
3.29 grams NaCl
Explanation:
I assume 0.45m is 0.45 molar. The m is usually capitalized, to prevent confusion with meters, moles, etc. : 0.45M
It is very useful to use of the definition of molar in the thought process.
The definition of molar, M, is moles solute per liter of solution. The term 0.45M NaCl means that a solution has 0.45 moles of NaCl in 1 liter of solution. a half-liter would have 0.225 moles of NaCl, which is equivalent to 0.45 moles/liter. in terms of concentration.
We'll need the molar mass of NaCl, which is:
Na: 23.0
Cl: 35.5
58.5 grams/mole
========
Now let's calculate how many moles of NaCl are needed. We want 125ml (0.125L) of 0.45M NaCl.
(0.45 moles NaCl/Liter)
multiply that by the actual volume required:
(0.45 moles NaCl/Liter)*(0.125Liter) = 0.0563 moles NaCl
[The liters unit cancels, leaving only moles NaCl. The units are helpful in understanding the mathematical steps required and help insure a correct answer.]
To get grams NaCl, multiply by the molar mass of NaCl:
(0.0563 moles NaCl)*(58.5 grams NaCl/mole NaCl) = 3.29 grams NaCl
Note the units: moles NaCl cancel, leaving grams NaCl.
=====
There is a useful relationship to remember concerning the dilution of a solution. It is not needed here, but it does highlight the usefulness of understanding units. When diluting a volume, V1, of a solution of concentration M1 to achieve a concentration and volume of of M2 and V2, we can use:
M1V1 = M2V2
Example: 125 ml of 1M HCl is needed for an experiment. The only supply is 5M HCl. How much of the 5M HCl is needed to make 125ml of the 1M HCl?
M1 = 5M HCl
V1 = The unknown
M2 = 2.5M HCl
V2 = 100 ml
M1V1 = M2V2
(5M)*(V1) = (1M)*(125ml)
V1 = (1M)*(125ml)/(5M)
V1 = 25 ml
25 ml of 5M HCl may be added to 75 ml of water (slowly) to form 100ml of 2.5M HCl.
===========
Extra material: This is not relevant to the original problem, but it demonstrates the importance of units and the fact that it is the moles of a substance that is the important element.
If the concentration and volume of M1V1 are in moles/liter and liter, the term M1V1 has units of:
(moles/Liter)*(L), which reduces to moles of the substance.
The same with the term on the right, M2V2: it also reduces to moles. So the equation is simply saying that whatever number of moles one starts with, the same number of moles will wind up in the final solution.
A bonus discovery is that the volume units cancel in this calculation. It seems unlikely, but this means the volumes don't need to be adjusted from ml to liters, since volume unit cancels out.
If the original problems stated that the goal is to make 125 ml of 0.45M NaCl from a stock of 1.0M NaCl solution, the calculation would be:
M1 = 1.0M NaCl
V1 = ?
M2 = 0.45M NaCl
V2 = 125 ml
M1V1 = M2V2
(1.0M)*(V1) = (0.45M)*(125ml)
V1 = 56.25 ml
68.75 ml of water may be added to 56.25 ml of NaCl to form 125 ml of 0.45M NaCl.
Although M is expressed as moles/liter, we don't need to convert the volumes to liters, because the M unit cancels out. That doesn't feel correct, but it is - the unit cancellation is legal.
During chemiosmosis, hydrogen ions accumulate in the ______ of the mitochondrion to create a large electrochemical gradient for aerobic cellular respiration.
In the course of chemiosmosis, hydrogen ions build up in the mitochondrion's intramembrane space to produce a significant electrochemical gradient for aerobic cellular respiration.
What is the chemiosmosis procedure?Protons are pumped through specialized channels in the mitochondrial membranes from the inner to the outer compartment during chemiosmosis. A gradient of proton (H+) is created by the pumping. Protons diffuse through a transport protein called ATP synthase to diffuse down the gradient once it has been formed.
How is ATP produced through chemiosmosis?Electrons are transferred from one molecule to another in the electron transport chain, and the energy released during these electron transfers is used to create an electrochemical gradient. The energy held in the gradient is utilized in chemiosmosis to produce ATP.
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identify the number of molecules in the chemical formula for Butane 5C4H10
Answer:
Explanation:
C=20
H=50
What did you include in your response? Check all that apply.
DNA is twisted in a double helix.
DNA is wrapped around proteins.
DNA is condensed into chromosomes.
This “packaging” is what allows a six-foot-long DNA molecule to fit into the nucleus of a tiny cell. What did you include in your response? Check all that apply.
DNA is twisted in a double helix.
DNA is wrapped around proteins.
DNA is condensed into chromosomes.
This “packaging” is what allows a six-foot-long DNA molecule to fit into the nucleus of a tiny cell.
In the response, the correct options are:
DNA is twisted in a double helix.DNA is wrapped around proteins.DNA is condensed into chromosomes are all correct.What is a DNA?Deoxyribonucleic acid (DNA) can be defined as a polymer composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses.
Although DNA is exceptionally long and therefore may seem impossible to fit in nucleus, it is contained in very a condensed and folded form. This form is called the DNA complex, chromatin. When paired with other genetic material such as histone proteins, this leads to creation of chromosomes.
The DNA stores instructions for making other large molecules, called proteins. These instructions are stored inside each of your cells, distributed among 46 long structures called chromosomes. The chromosomes is built up of thousands of shorter segments of DNA, called gene
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Answer:
In the response, the correct options are:
DNA is twisted in a double helix.
DNA is wrapped around proteins.
DNA is condensed into chromosomes are all correct.
Helppp ASAP pleaseee
Answer:
1. B, E
2. A
Explanation:
What is the future of Nanoparticles in medicine
Answer:
nanoparticle cancer drugs could act like biological missiles that destroy tumors while minimizing damage to healthy organs
The following properties are either physical or chemical. Which one is different from the
rest based on those two categories?
A substance's ability to be observed or measured without altering its identity is referred to as its physical property. How successfully a substance can undergo a specific chemical transition is determined by its chemical characteristic.
What separates chemical characteristics from physical characteristics?A substance's ability to be observed or measured without altering its identity is referred to as its physical property. Physical characteristics might include things like color, density, hardness, melting, and boiling points, among other things. How successfully a substance can undergo a specific chemical transition is determined by its chemical characteristic.
What can be categorized into groups based on their chemical and physical traits?Based on their physical and chemical properties, materials can be grouped. Matter is anything that has mass and space. It is possible to mix any solid, liquid, and gas. When a substance changes from one state of matter to another without changing its chemical composition, a physical transition takes place.
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What are some Harmful effects of Nanoparticles in medicine
Explanation:
The effects of inhaled nanoparticles in the body may include lung inflammation and heart problems. Studies in humans show that breathing in diesel soot causes a general inflammatory response and alters the system that regulates the involuntary functions in the cardiovascular system, such as control of heart rate.
what volume (ml) of 0.0755 m phosphoric acid can be neutralized with 130 ml of 0.245 m sodium hydroxide? what volume (ml) of 0.0755 m phosphoric acid can be neutralized with 130 ml of 0.245 m sodium hydroxide? 2340 141 1270 422 7.21
146 mL of 0.0755 m phosphoric acid can be neutralized with 130 ml of 0.245 m sodium hydroxide.
First of all, let's write a balanced equation.
The balanced equation is given below.
H₃PO₄ + 3 NaOH ⇒ Na₃PO₄ + 3 H₂O
Now calculate the moles of sodium hydroxide taking part in the reaction.
130 ml of 0.245 m sodium hydroxide react.
0.13 L x 0.245/L = 0.03185 moles
Now let's calculate the reacting moles of H₃PO₄.
The molar ratio of H₃PO₄ to NaOH is 1:3.
The reacting moles of H₃PO₄ are 1/3 x 0.03185 moles = 0.011 moles
Let's calculate the reacting volume of phosphoric acid
We have 0.011 moles of H₃PO₄ are in a 0.0755 M solution.
0.011 mol x 1L/0.0755 x 1,000 mL1/L = 145.6 mL (approx 146 mL)
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Based on the Hertzprung-Russell diagram, which statement is true? OA. Main sequence stars with low temperatures tend to have low luminosity. B. Supergiants tend to have high luminosity and high temperatures. OC. Giants tend to be the stars with the highest luminosity. D. Main sequence stars with high temperatures tend to have low luminosity.
Main sequence stars with low temperatures tend to have low luminosity is based on Hertzprung-Russell diagram
What is the Hertzsprung-Russell diagram's main sequence?The bright, hot stars in the image's upper left are the main sequence group, which stretches roughly diagonally to the lower right (dim and cool). In the bottom left are white dwarfs, which are small, faint, and hot. In the top right are giant and supergiant stars, which are big, bright, and cool.
What is the main sequence star H-R diagram trend?Main sequence stars have a wide range of effective temperatures, but because they are brighter at higher temperatures, they normally follow a band from the bottom right to the top left of the diagram. Inside the cores, hydrogen and helium are fusing together.
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Answer: White dwarfs
Explanation: edge2020
Question 3
1 pts
To find the volume of your element, you completed wate displacement, which is
calculated by Final volume - Initial volume. Originally 13. mL of water was placed into
the graduated cylinder. After you object was placed into the graduated cylinder, the
water level raised to 19.5 mL. Calculate the volume of the object.
The volume of the object is calculated out to be 6.5 mL when the volume of your element completed displacement which is calculated.
What is the displacement and how the volume of the object is calculated out to be so?Displacement is the shortest distance between the initial point and the final point.Here in this question given the initial volume to be 13 mL , and the final volume to be 19.5 mL.To calculate the volume which is supposed to be the final volume , we will substract the volumes given.The substraction of the initial volume and the final volume would be 19.5 - 13 which equals 6.5 mL.This is how the final volume of the object is calculated out to be 6.5 mL.To know more about volume visit:
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What is activation energy?
Answer: The minimum amount of energy which the reacting species must possess in order to undergo a specified reaction.
Explanation:
Think of substances that you see around you. At an atomic level, what might a bottle of water look like and how does it
change when they undergo chemical reactions?
Answer:
burning of candle
Explanation:
because a candle is at a solid state when it burn it changes into liquid substance and when it dry it returns to solid
When is mass not conserved?
Mass is not conserved when the chemical reaction occurs inside the body.
What violates the conservation of mass?Mass is converted into energy when reactions within the mass occur. Nuclear reactions violate the law of conservation of mass. No new atoms are created during the reaction and no existing atoms disappear or are destroyed showing that mass is conserved. Mass can not be conserved because a little amount of mass turns into energy in every chemical reaction. But mass + energy is always conserved. Energy can only be created by destroying the specific amount of mass according to the equation of energy i.e. E = mc².
So we can conclude that nuclear reactions are the cause due to which mass is not conserved.
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Watch the video of Norman. What type of energy transformation is happening?
Norman sliding his foot across the floor.
A Electrical energy is created by friction when his foot slides across the floor.
B The mechanical energy of his foot moving across the floor is transformed into chemical energy.
C When his foot is sliding across the floor, it creates heat energy through friction.
D When his foot rubs against the floor, the energy of motion changes into light energy.
Norman sliding his foot across the floor would create heat energy through friction (C)
When a person is sliding on the floor, the foot would rub against the floor. The process would result in friction between the feet and the floor.
In addition to that, the potential energy (resting energy) is getting converted to kinetic energy (energy resulting from motion). The difference between the energy of an object at resting state and motion would result in production of heat energy. This is caused mainly due to friction.
Thus, when Norman’s foot is sliding across the floor, it would create heat energy through friction.
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the formation of from acetyl-coa and bicarbonate is the first step in fatty acid synthesis. the formation of from acetyl-coa and bicarbonate is the first step in fatty acid synthesis. malonyl-coa acyl-coa succinyl-coa propionyl-coa
The first step in the production of fatty acids is the conversion of acetyl-CoA to malonyl-CoA by the enzyme acetyl-CoA carboxylase.
Oxidation of a fatty acid :Starting at carbon atom 3, the -carbon of the fatty acyl chain, fatty acids undergo oxidative removal of successive two-carbon units as acetyl-CoA in the first step. Palmitoyl ACP is produced after a continuous cycle of transfer, elongation, reduction, dehydration, and reduction. The 16-carbon fatty acid palmitate is then released from the FAS by the FAS complex's thioesterase activity.
The process of oxidizing fatty acids to create acetyl-CoA. In essence, fatty acids produce NADH and FADH2 for every two carbons in the chain as they are broken down into an acetyl CoA.
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the atomic number of an element x is 14 and it's relative atomic mass is 28
To get the number of neutrons use the formula i.e. No. of neutrons=mass number-atomic number. Therefore , 28–14 = 14neutrons.
Which element has a relative atomic mass of 28?Silicon-28 atom is the stable isotope of silicon with relative atomic mass 27.9769265.
How is relative mass determined?By multiplying the proton and neutron counts of the exact isotope that interests you, you may always find the relative mass of an element. For instance, an atom of carbon-12 has a relative atomic mass of 12 due to its composition of 6 protons and 6 neutrons.
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Can someone help me solve this? I’ve been stuck on it for days and it’s due tomorrow. Thanks :)
1. (i) Magnesium 1
No of protons: 12
No of electrons: 12
No of neutrons: 12
Mass number: 24
(ii) Magnesium 2
No of protons: 12
No of electrons: 12
No of neutrons: 13
Mass number: 25
(iii) Magnesium 3
No of protons: 12
No of electrons: 10
No of neutrons: 13
Mass number: 25
2. Magnesium 1: Atom
Magnesium 2: Atom
Magnesium 3: Ion
3. Isotopes of Magnesium
4. Heaviest magnesium isotope: ²⁶ Mg
5. 5.1) Charge = -12
5.2) Charge = +12
6. Relative charge of magnesium 3 is +2
Magnesium has 3 stable isotopes. Isotopes have same number of proton.
If the proton and electron is equal in an element, it is an atom. If it differs, it becomes an ion.
The relative charge of a proton is +1 and the relative charge of an electron is -1.
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how much number of molecules are in 56 liter of c2o
1. If the Moxie's tank has an initial pressure of 50 atm in the winter, what will be *
the pressure in the summer?
O 5.88 atm
22.6 atm
O 110.5 atm
ہے
In the summer, the Moxie's tank will be under 110.5 atm of pressure.
The right answer is C.
What is the law of pressure?The pressure law states that for a given quantity of gas, provided the volume stays constant, the pressure exerted on the container's sidewalls is exactly proportional to the absolute temperature of the gas.
Briefing: The mathematical formulation of this rule is
[tex]\frac{P_1}{T_1 }= \frac{P_2}{T_2}[/tex]
where
The initial pressure is P1.
P2 is the ultimate pressure.
T1 is the initial temperature.
T2 is the final temperature.
As the gas's temperature rises, so does its pressure.
The pressure within the Moxie's tank will thus be greater than 50 atm throughout the summer since summer temperatures are higher than winter ones.
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a person’s blood alcohol (c2h5oh) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. the balanced equation is 16 h⁺ (aq) 2 cr2o7²⁻ (aq) c2h5oh (aq) ⟶ 4 cr³⁺ (aq) 2 co2 (g) 11 h2o (l) if 35.46 ml of 0.05961 m cr2o7²⁻ is required to titrate 28.00 g of plasma, what is the mass percent of alcohol in the blood?
The percent of alcohol in the blood is found to be 0.1739%.
Given:
Volume of [tex]Cr_2O_7^{2-}[/tex] = 35.46mL
Molarity of [tex]Cr_2O_7^{2-}[/tex] = 0.05961M
Molar mass of [tex]C_2H_5OH[/tex] = 46.07g/mol
Mass of Plasma = 28.00g
The balanced equation for the titration reaction of percent of alcohol in the blood is:
[tex]16H^+ (aq) + 2Cr_2O_7^{2-} (aq) + C_2H_5OH (aq) \rightarrow 4Cr^{3+} (aq) + 2CO_2 (g) + 11H_2O (l)[/tex]
To find:
Percent of alcohol in the blood = ?
Formula:
Percent of alcohol in the blood = Mass of alcohol / mass of plasma x 100
Calculations:
The No. of moles of [tex]Cr_2O_7^{2-}[/tex] in 35.46 mL of 0.05961 M [tex]Cr_2O_7^{2-}[/tex] are:
35.46 x 0.05961= 2.114 x [tex]10^{-3}[/tex] mol
2:1 is the molar ratio of [tex]Cr_2O_7^{2-}[/tex] to alcohol in the blood ([tex]C_2H_5OH[/tex]).
Therefore, the no. of moles of [tex]C_2H_5OH[/tex] are 1/2 x 2.114 x [tex]10^{-3}[/tex] = 1.057 x [tex]10^{-3}[/tex] mol
The molar mass of alcohol ([tex]C_2H_5OH[/tex]) is 46.07g/mol.
The mass of alcohol corresponding to 1.057 x [tex]10^{-3}[/tex] moles is:
1.057 x [tex]10^{-3}[/tex] x 46.07 = 0.04870g
The percent of alcohol in the blood of 28.00 g plasma is:
(0.04870 /28.00) x 100 % = 0.1739%
Result:
0.1739% alcohol is present in 28g blood plasma.
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____ and ____ are the two subatomic particles found in an element's nucleus. Responses A neutrons, protonsneutrons, protons B protons, electronsprotons, electrons C electrons, neutrons
Considering the structure of the atom, neutrons and protons are the two subatomic particles found in an element's nucleus.
Structure of the atomAll atoms are made up of:
Protons: are positively charged particles and are located in the nucleus of the atom.Neutrons: are uncharged particles and have a mass size similar to protons. They are also located in the nucleus of the atom.Electrons: have a negative charge equal to 1 and have negligible mass. They move around the nucleus at different energy levels.In summary, protons and neutrons are part of their nucleus and electrons revolve around them. Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged.
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Describe how proteins are made, packaged, and transported within the cell?????????????
The proteins are the first to assemble in the organelle called the irregular endoplasmic reticulum and then the proteins are transported by an organelle known as the Golgi bodies.
How proteins are produced and transported within the cell?Protein cargo moves from the ER to the Golgi is modified within the Golgi and is sent to various destinations in the cell, including the lysosomes and the cell surface. The Golgi procedure proteins are made by the endoplasmic reticulum (ER) before getting off them to the cell. All channel proteins and carrier proteins allow solutes to cross the membrane without the use of energy is called passive transport, or facilitated diffusion. These proteins, and specific genes within its DNA must first be transcribed into molecules of mRNA; then, these transcripts must be translated into chains of amino acids, which later folded into fully functional proteins. The organelle that transports proteins is called the endoplasmic reticulum.
So we can conclude that the endoplasmic reticulum is responsible for the production of protein and transported by the Golgi bodies.
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4. As you add neutrons to the simulation, which number is changing on the isotope symbol?
The chemical symbol
The atomic number
The number of protons
The mass number
Search up isotope phet simulation to answer