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16 November, 01:11

How many neutrons does element X have if its atomic number is 24 and its mass number is 99?

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  1. 16 November, 01:39
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    Element X has 75 neutrons.

    Explanation

    Subtract the mass number from the atomic number to determine the number of neutrons.

    99-24 = 75

    Element x has 75 neutrons.
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