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5 November, 02:32

Use the periodic table to determine which of the following could be an isotope of indium (In). Check all that apply. Z = 49, A = 113 N = 64, Z = 49 N = 61, A = 113 A = 110, N = 49

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  1. 5 November, 03:34
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    correct answer is Z = 49, A = 113

    N = 64, Z = 49 so A&B
  2. 5 November, 06:13
    0
    The isotopes are the elements with same atomic number but different atomic mass or mass number

    The mass number is denoted by Z

    The mass number is denoted by A

    The number of neutrons = N

    We know that for an element

    A = Z + N

    As given the element is indium, its atomic number = Z = 49

    Z = 49, A = 113 N = 64, This could be an isotope of indium

    Z = 49 N = 61, A = 113, this could also be an isotope of indium

    A = 110, N = 49 it means Z = Z - N = 110-49 = 61 So this is not isotope of indium
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