What is the atomic mass of the element cobalt (co)?

59

Explanation:

The mass number of an atom is usually the sum of the protons and neutrons in its nucleus. The common isotope of Cobalt has 27 protons and 32 neutrons. However, there are several other isotopes (less stable) of cobalt with a higher mass number such as cobalt-60.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully

the answer is c because it is most logical.