Identify the mass number of an ion with 20 protons, 22 neutrons, and 18 electrons.

asked Mar 21, 2021 54.6k views

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3 votes

Answer:

Step-by-step explanation:

Relative mass = number of protons + number of neutrons

Relative mass = 20 + 22

Relative mass = 42

Jlbriggs answered Mar 26, 2021

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