If the amount of cfcs in the atmosphere decreases, then

plato users: ozone holes could begin to shrink in size

Ozone holes could begin to shrink in size.

Explanation:

The use of CFCs today is one of the anthropogenic causes of ozone depletion. CFCs are found in Air conditioners, refrigerators and are excellent coolants.

When CFCs are released into the atmosphere, they react spontaneously with ozone.

Ozone is made up of 3 oxygen atoms and it serves as a protective covering for the very harmful ultraviolet rays from reaching the earth. Ozone cuts off these radiation and it reflects them back into space.

Chloroflurocarbons release Chlroine atoms when they get broken down by ultraviolet rays. The Cl released produces a series of reactions in the presence of ozone.

Chlorine is very reactive as it is an halogen. It requires just an electron to complete its octet.

Chlorine freely reacts with the ozone producing a range of compounds. Most of the ozone becomes oxygen molecules.

This would deplete the ozone greatly. The increasing use of CFCs leaves holes in the ozone layer. The holes allow for harmful UV rays to reach the earth surface. This can lead to various harm on human lives on the earth surface.

This is why CFCs are not permitted in appliances again.

the answer is c i believe

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8