The atmosphere is:

a. the layer of water on earths surface

b. the layer of molten lave just below the earths crust

c. the layer of air surrounding earth’s surface

d. the layer of soil lying just over earth’s crust

The answer is C. The atmosphere is the many layers of air that surrounds the Earth. I hope this helped! :-)

answer; /// the amount of material dissolved in a measure of liquid(concentration) the above statement is (true); /// good luck

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.