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8 November, 03:52

Calculate the number of neutrons for the following atoms: 6 C13; 19 K41; 35 Br80 (Subtract atomic number from atomic mass)

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  1. 8 November, 05:18
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    The number of neutrons: ¹³C₆ = 7, ⁴¹K₁₉ = 22, ⁸⁰Br₃₅ = 45.

    Explanation:

    The mass number (A) of an atom is equal to the sum of the atomic number (Z) and the number of neutrons (N).

    A = Z + N

    Therefore, the number of neutrons, N = A - Z

    1. C : A = 13 and Z = 6

    The number of neutrons, N = A - Z = 13 - 6 = 7 neutrons

    2. K : A = 41 and Z = 19

    The number of neutrons, N = A - Z = 41 - 19 = 22 neutrons

    3. Br : A = 80 and Z = 35

    The number of neutrons, N = A - Z = 80 - 35 = 45 neutrons
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