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25 March, 17:27

Element A has 15 protons. Determine the number of neutrons in its isotope with mass number 33.

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Answers (2)
  1. 25 March, 17:39
    0
    A=Z+N

    A=mass number (protons + neutrons)

    Z=atomic number (number of protons).

    N=number of neutrons.

    dа ta:

    Z=15

    A=33

    Then:

    33=15+N

    N=33-15=18

    Answer: the number of neutrons in this element A will be 18.
  2. 25 March, 17:54
    0
    Number of neutrons is mass number minus number of protons.

    So the number of neutrons is 18.
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