Question

Circle the correct word: Electrons contribute to an atom's (mass or volume).​

Answer 1

Answer: Volume

Explanation: Only protons and neutrons contribute to the atom's mass, because electrons have a mass of only
`(1)/(1836)` that of the proton, so it's not even counted.

However, electrons take up 99.9% of the atom, in what is called the Electron Cloud.