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 $\frac{1}{1836}$ 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.

Answer 2

Answer: volume

Explanation: Therefore, they do not contribute much to an element’s overall atomic mass. When considering atomic mass, it is customary to ignore the mass of any electrons and calculate the atom’s mass. So, it's volume.

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