Multiple Choice Questions on An atom has 7 electrons in it rsquo s M shell and contains 18 neutrons in it rsquo s nucleus What is........... for UPSC Civil Services Examination (General Studies) Preparation

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Multiple Choice Questions

An atom has 7 electrons in it rsquo s M shell and contains 18 neutrons in it rsquo s nucleus What is...........

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    An atom has 7 electrons in it’s M-shell and contains 18 neutrons in it’s nucleus. What is its mass number?

    25   

    Incorrect Answer

    27

    Incorrect Answer

    35

    Correct Answer

    43

    Incorrect Answer
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    Explanation:

    An atom has 7 electrons in it’s M-shell and contains 18 neutrons in it’s nucleus, its mass number is 35.

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