What makes up nearly all of the atom's mass?

Chemistry

2 answers:

VMariaS [17]2 years ago

7 0

Sum of the number of protons and neutrons, which is the nucleus

Ber [7]2 years ago

5 0

Answer:

The Nucleus

Explanation:

The nucleus of an atom contains both the protons (positively charged particles) and the neutrons (particles with no charge) - these two set of particles present in the nucleus of an atom determines the mass of an atom. Hence, atomic mass is the sum of the number of protons and number of neutrons present in the nucleus of an atom.

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