2. Which equation shows the relationship between the Kelvin and Celsius temperature scales? O K = 273 - °C
O K = °F + 273
O K = °C + 273
O K = °C + OF

I think the right answer is c

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.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.