How would increased chlorofluorocarbons (cfcs) in the atmosphere affect the growth of vegetation throughout the world?

a. ultraviolet light will decrease on earth’s surface. it will lower temperatures and increase plant populations.
b. ultraviolet light will increase on earth’s surface. it will raise temperatures and decrease plant populations.
c. ultraviolet light will increase on earth’s surface. it will raise temperatures and increase plant populations.
d. ultraviolet light will decrease on earth’s surface. it will lower temperatures and decrease plant populations.

it means there are 3 atoms of oxygen

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.