Multiple Choice Questions on An element X has mass number 40 and contains 21 neutrons in its atom To which group of the Periodic ........... for 10th Standard Preparation

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Multiple Choice Questions

An element X has mass number 40 and contains 21 neutrons in its atom To which group of the Periodic ...........

Chemistry Chapter - 5
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    An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?

    Group 1

    Correct Answer

    Group 4

    Incorrect Answer

    Group 2

    Incorrect Answer

    Group 3

    Incorrect Answer
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    Explanation:

    Reason. e = 19 (2, 8, 8,1)

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