Chemistry, 20.10.2021 02:00, stephanieanaya7

1. A unit of mass used to express atomic and molecular weights. One proton or neutron equals one mass unit.

Atom

Atomic mass

Nucleus

Amy

Protons

Neutrons

Uranium

Electrons

Hydrogen

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1. A unit of mass used to express atomic and molecular weights. One proton or neutron equals one m...