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29 July, 08:15

How many of each subatomic particle type does each of the following atoms contain: a. 90_Ag b. barium-132

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  1. 29 July, 12:05
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    Answer: Silver has 47 electrons, 47 protons and 43 neutrons. Barium has 56 electrons, 56 protons and 76 neutrons.

    Explanation:

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

    Atomic number = number of protons = number of electrons

    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

    For Silver:

    Atomic number = 47

    Mass number = 90

    Atomic number = Number of protons = Number of electrons = 47

    Number of neutrons = Mass number - Atomic number = 90 - 47 = 43

    Hence, silver has 47 electrons, 47 protons and 43 neutrons.

    For Barium:

    Atomic number = 56

    Mass number = 132

    Atomic number = Number of protons = Number of electrons = 56

    Number of neutrons = Mass number - Atomic number = 132 - 56 = 76

    Hence, barium has 56 electrons, 56 protons and 76 neutrons.
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