2 years ago

What is a rule for determining the mass number of an atom or ion?

Chemistry

1 answer:

Semenov [28]2 years ago

7 0

Answer:

The mass number of the atom is equal to the sum of the number of protons and neutrons in the nucleus

Explanation:

Each proton and each neutron weigh one amu( atomic mass unit), adding together the neutrons and protons and multiplying by 1 amu you get the mass of an atom

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