Answer:
1s²2s^1
Explanation:
Lithium Z = 3
The nervous system sends messages to control activities in the body. false true
Answer:
true
Explanation:
took test
The energy needed to remove an electron is called ionization energy.
Which of the statements are true of ionization energy and its trends found in the periodic table?
increases going down a column (top to bottom)
decreases going across a row (left to right)
increases going across a row (left to right)
decreases going down a column (top to bottom)
Answer:
im pretty sure its decreases going across a row (left to right)
Explanation:
As you move from left to right across a period on the periodic table the size of an atom will decrease
Hope this helps! Have a nice day!Which type of heat transfer can cause the butter to melt?
A. Convection
B. Conduction
C. Radiation
D. Heat
Answer:
radiation
LOL but also heat
Explanation:
hope this helps
A molecule _____. is made of more than one atom is the same as a compound must be made of more than one element can only contain two atoms
Answer:
it is not an act answer but it has information
Explanation:
A molecule is defined as two or more atoms of the same element different element that are bound together. A molecule may be homonuclear, which means, it consists of atoms of one chemical element, as with oxygen (O2); or it may be heteronuclear, a chemical compound composed of more than one element, as with water (H2O).
A molecule is made up of two or more atoms, and it can be composed of atoms of the same element or different elements.
A molecule is a particle that consists of two or more atoms chemically bonded together. It is the smallest unit of a compound that retains the chemical properties of that compound.
Molecules can be composed of atoms of the same element or different elements. When atoms of the same element combine to form a molecule, it is called a diatomic molecule.
On the other hand, molecules can also be formed when atoms of different elements combine. In this case, the molecule is considered a compound. Compounds are composed of two or more different elements chemically bonded together.
Hence, a molecule is made up of two or more atoms, and it can be composed of atoms of the same element or different elements.
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#SPJ 2
Why are gamma rays not able to reflect off a mirrors surface
Answer:
the Ray's go right through it
Explanation:
the Ray's are so small they punch right through them
Answer:
Explanation:
The reason why is based in something called the plasma frequency of the metal of a mirror. A metal, as you may know, is composed of a series of atom (ion, effectively) cores - nuclei, together with some, but not all, of their bound electrons - which contribute the remaining outermost electrons of their unbound forms to a communally shared "electron sea" - kind of like a giant, distributed omnidirectional covalent bond that extends all throughout the whole metal crystal (here we're just considering a single crystal for simplicity). The electrons are quantumed out all over the full extent of the crystal and effectively form a sort of "gas" throughout and permeating the metal.
When an electromagnetic wave approaches that gas, the free charges within it - the electrons - start oscillating, and as they do so, they set up another wave going outward at the same time as the first is going in. This begins as soon as the first wave begins to impinge.
However, if the wave oscillation is fast enough, the electrons can't keep up due to their mass, and thus they are unable to form the reflected wave. The frequency at which this occurs is called the metal's plasma frequency (and is inversely proportional to the square root of the mass, so that a high mass particle would have a lower plasma frequency). The name comes from the fact that the metal can be thought of in a sense as a kind of "solid plasma" - ions with free electrons, the difference with what most people think of as a "plasma" being here the ions are not free to move about of their own accord.
If a wave has low energy it therefore, it has ___________ frequency.
Answer:
I think it would have a LOW frequency rate.
Explanation:
HELLLLP ASAP PLZ
1. A front forms when ____
A. two air masses move away from each other
B. two air masses bump into each other
2. On a weather map, a red line with half circles shows a(n) ______.
A. occluded front
B. cold front
C. warm front
3. The blue triangles of a cold front point in the direction ______.
A. the front is going
B. the front has come from
C. where the temperature is colder
Answer:
1 is B, 2 is B a cold front
Explanation:
In order for a front to form, two air masses have to collide, and for 2 a cold front is represented by a red ljine with half circles
The rate of a reaction depends on temperature, concentration, particle
size and catalysts. Which statement is not correct?
Answer:
I think the particle size
Explanation:
By decreasing the particle size of a reactant, we are increasing its surface area. The greater the surface area, the higher the chance of collisions, thus the faster the rate of reaction.
increasing the particle size will decrease the rate of reaction.
conclusion:
The smaller the particle size the faster the reaction.
The statement which is not correct is that: the rate of a reaction increases with increasing particle size.
Discussion;
The addition of catalyst, increase in temperature and reactant concentration all are factors which increase the rate of a chemical reaction.
Decreasing the particle size of reactants also increases the rate of reaction. This is because upon decreasing particle size, the surface area of the reactants is increased and the reaction is able to take place at a faster rate.
Read more on rate of reaction;
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The isotope 106 46Pd (106 on top and 46 on bottom)
has
1. 60 protons.
2. 106 neutrons.
3. 46 neutrons.
4. 60 neutrons.
Can I also have an explanation as well plz
Answer:
4. 60 neutrons.
Explanation:
The given isotopes;
¹⁰⁶₄₆Pd
In this isotope, we can deduce that the mass number is the superscript and the atomic number is the subscript;
Mass number = 106
Atomic number = 46
Mass number is the number of protons and neutrons in an atom;
Mass number = Protons + neutrons
Atomic number is the number of protons
So, Number of protons = 46
Number of neutrons = Mass number - Atomic number
= 106 - 46
= 60
Number of neutrons = 60
can someone plz help me with science.
Order the items from smallest at the top to largest at the bottom. cell,elephant,human body,school bus,organ,molecule.
Explanation:
Unordered items;
cell, elephant, human body, school bus, organ ,molecule.
This problem deals with the organization of life. We move from cells, to tissues, organs, and then systems.
Molecule
Cell
Organ
Human body
Elephant
School bus
School bus is the largest from the giving items although it is non-living.
What is required for two atoms to share electrons equally in a chemical bond?
A. The two atoms must have the same number of valence electrons.
B. The two atoms must have equal and opposite charges.
C. The two atoms must be of the same element.
D. The two atoms must both be nonmetals.
Answer:
C. the two atoms must be of the same element
Write a balanced chemical equation for the reaction that occurs when Mg(s) reacts with Cl2(g).
Explanation:
When magnesium reacts with chlorine then it forms magnesium chloride.
Equation -
Mg + Cl₂ → MgCl₂
This is the example of Combination reaction.
is disilicon tetraoxide held together by a covalent or polar covalent?
Explanation:
The compound disilicon tetraoxide has the formula;
Si₂O₄;
This compound is held together by a polar covalent bond. A polar covalent bond occurs between two species that shares electrons. In this bond type, the more electronegative element draws the shared electrons more closer to itself.
Oxygen is more electronegative than silicon. It will draw the shared electrons more closer. This leaves a partial positive charge on the silicon and a negative charge on the oxygen.
As Mia mixed two substances in a test tube, she noticed that the test tube became warm. She also noticed gas coming from the test tube. Based on Mia's observations, what was most likely occurring inside the test tube?
A.The two substances underwent a physical change
B.The two substances were melting
C.A new substance was forming
D.A change in the mass of the two substances
Answer:
a new substance was forming
Explanation:
pleaseee helpppp
A chemist measures the enthalpy change AH during the following reaction:
2 Na(s) + Cl2(9)-2 NaCl(s)
AH=-822. kJ
Use this information to complete the table below. Round each of your answers to the nearest kJ/mol.
How many moles are in 1.204 x 1024 atoms of Zn ?
Answer:
2 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{1.204 \times {10}^{24} }{6.02 \times {10}^{23} } \\ [/tex]
We have the final answer as
2 molesHope this helps you
Which metric prefix is used for hundredths ( 0.01) ?
Mole ratio compares the subscripts of two compounds in a balanced reaction.
(1 Point)
TRUE
FALSE
Answer:
The correct option is FALSE
Explanation:
Mole ratio is the ratio of the number of moles of two compounds in a balanced chemical reaction. Number of moles of a compound in a chemical reaction is the number written before the compound.
For example, the mole ratio of Iron (Fe) and water (H₂O) in the equation below is 3:4
3Fe + 4H₂O ⇒ Fe₃O₄ + 4H₂
Thus, mole ratio does not compare subscripts of compounds.
what is Orthocoronavirinae?
3 electron layers in the electron shell and 1 electron in the last electron layer
Answer:
The closest shell to the nucleus is called the "1 shell" (also called the "K shell"), followed by the "2 shell" (or "L shell"), then the "3 shell" (or "M shell"), and so on farther and farther from the nucleus.
start out as one kind of rock, but large amounts of pressure and heat change them into a different kind.
Answer:
Metamorphic
Explanation:
The diagram below shows the different phase transitions that occur in matter. Three bars are shown labeled Solid, Liquid, and Gas. They are connected by arrows labeled 1 to 6. Arrow 1 points from liquid to gas; arrow 2 from solid to liquid, arrow 3 from solid to gas, arrow 4 from gas to liquid, arrow 5 from liquid to solid, and arrow 6 from gas to solid. Which best describes the process that arrow 1 represents? Molecules are speeding up during boiling. Molecules are depositing as ice on a surface. Molecules are slowing down during condensing. Molecules are moving from stationary positions.
Answer:
A. Molecules are speeding up during boiling.
Explanation:
Answer:it’s A molocules are spending up during boiling
Explanation:got it right on ed
Why do you think it might be useful to know the distance between a gun fired and its target? (Forensics)
Answer:
Yes, because in situations where an individual has been shot, it may be helpful for investigators to know how far away the shooter was from the victim. For example, in some cases a defendant accused of murderr may say that the shooting happened in self-defence. The actual distance between the two individuals may indicate whether the defendant is telling the truth. Similarly, knowing the approximate distance of a shot can help forensic scientists determine if a death was a suic ! de, or if it was a homic! de made to look like a suic! de.
Explanation:
sorry, brainly wont let me write out certain words
Which process is diagrammed in the figure below?Which of the following facts about the ocean water indicates that the ocean is a major resource of nutrients?
Answer:
Upwelling
Explanation:
The density of a substance having a mass of 9 x 10^5 g and a volume of 3 x 10^-1 cm3 is
Answer:
3,000,000 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{9 \times {10}^{5} }{3 \times {10}^{ - 1} } \\ [/tex]
We have the final answer as
3,000,000 g/cm³Hope this helps you
When writing a formula for a compound having a transition metal in it, _____.
it is sometimes necessary to use the Roman numeral as the assigned charge of the metal
it is sometimes necessary to include a Roman numeral after the symbol of the metal
it is always necessary to include a Roman numeral after the symbol of the metal
it is always necessary to use the Roman numeral as the assigned charge of the metal
-please explain
Answer:
it is always necessary to use the roman numeral as the assigned charge of the metal.
Explanation:
This is so that one would know which Transition metal is being used. For example copper (II) would be Cu²+
Black fit, Gosha, Gosha, gold fangs (Gold fangs)
Long clip, Gosha, Gosha, bang, bang (Bang, bang)
Black fit, Gosha, Gosha, gold fangs (Gold fangs)
Long clip, Gosha, Gosha, bang, bang (Bang, bang)
Black fit, Gosha, Gosha, gold fangs (Gold fangs)
[Outro]
Ayy
Answer:
Gosha Gosha
Explanation:
What do you know about a chemical reaction if the value of H is positive?
Why can't antibiotics be used on viruses?
What happens during a chemical reaction how do you know when a chemical reaction has occurred and how can you represent chemical reactions with equations??
We know that a chemical reaction has occurred by the appearance of a solid, evolution of a gas or change of color.
What is a chemical reaction?A chemical reaction refers to an interaction between reactants which leads to the formation of a product. A chemical reaction is represented using a chemical reaction equation.
We know that a chemical reaction has occurred when new substances appear in the system. This is signaled by the appearance of a solid, evolution of a gas or change of color.
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