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16 March, 07:22

Nitrogen-14 has 7 protons. How many neutrons does it have?

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  1. 16 March, 07:51
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    7

    Explanation:

    Using information found on the Periodic Table of Elements:

    Nitrogen contains 7 protons, 7 neutrons, and 7 electrons.

    ...

    Atomic number is 7

    Atomic mass is 14

    The mass number is the sum of protons and neutrons in the nucleus.

    => You can subtract the atomic number from the mass number to find the number of neutrons.
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