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6 May, 14:16

The atomic number of krypton (Kr) is 36, and its mass number is 84. How many neutrons does it have?

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Answers (2)
  1. 6 May, 14:21
    0
    Answer: 48 neutrons

    Explanation:

    Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

    Mass number = Number of protons + Number of neutrons

    Atomic number is defined as the number of protons or number of electrons that are present in an atom.

    Atomic number = Number of electrons = Number of protons

    Given: Atomic number of Krypton = Number of electrons = Number of protons = 36

    Mass number of krypton = Number of protons + Number of neutrons = 84

    Thus, 84 = 36 + Number of neutrons

    Number of neutrons = 48

    Thus krypton has 48 neutrons.
  2. 6 May, 14:21
    0
    i believe the answer is 48 neutrons
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