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Llana [10]
3 years ago
8

I need sum help on this

Chemistry
1 answer:
natka813 [3]3 years ago
8 0

Answer:

Protons and Neutrons

Explanation:

Neutrons and protons constitute almost all of an atom's mass. The third type of stable particle is the electron. Electrons have a negative charge but are extremely small and have a mass only 1/1850 that of a proton or neutron. They are so small that for practical purposes they do not contribute to the mass of the atom.

I hope this helped!

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