Answered

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what two particles account for almost all of the mass of an atom?

Sagot :

The two particles that account for the mass of an atom are protons and neutrons. Electrons on the other hand are negligible mass, and so light they are considered without weight.
soysauce
Protons and neutrons have an atomic mass unit (amu) weight of 1 while electrons are so light they are considered weightless.

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