What is the mass number of an element if its atom contains 10 protons, 10 electrons and 12 neutrons? - SchoolNGR

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What is the mass number of an element if its atom contains 10 protons, 10 electrons and ...

What is the mass number of an element if its atom contains 10 protons, 10 electrons and 12 neutrons?

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Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE

A 32
B 22
C 20
D 10

Correct Answer: Option B

Explanation:

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