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17 November, 16:26

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

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  1. 17 November, 17:57
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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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