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01-10-2020
Chemistry

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

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Nikeon202 Nikeon202

14-10-2020

Answer:

42

Explanation:

Relative mass = number of protons + number of neutrons

Relative mass = 20 + 22

Relative mass = 42

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