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Nucleus: Common Terms

An element ha...

Question

An element has 10 electrons and 12 neutrons. What is the mass number of the element?

A

32

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B

22

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C

12

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D

10

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Solution

The correct option is B
22

Since an atom is neutral, you can conclude that the given atom has 10 protons as it has 10 electrons.Mass number = No. of protons + No. of Neutrons. Mass number = 10 + 12 = 22

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