Is a carbon atom alive?

No

Explanation:

Like I said before in a question similar to this one no it is not alive. Although, Carbon is found in all living things and they  move constantly through living organisms, the oceans, the atmosphere, and the Earth’s crust in what is known as the carbon cycle it does not consist of all 7 characteristics that are needed to be considered an organism. For example reproduction and response to stimulus it does neither

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.