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28 August, 13:44

Determine the element symbol, number of protons, and number of electrons for an ion that has a mass number of 56, 30 neutrons, and a charge of + 3.

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Answers (2)
  1. 28 August, 14:07
    0
    Element symbol: Iron (Fe)

    Number of protons: 26

    Number of electrons: 23

    Explanation:

    Recall that:

    Mass number = Number of protons + Number of neutrons

    56 = y + 30

    y = 56 - 30 = 26

    Thus, the number of protons is 26

    Also, recall that Atomic number = Number of protons

    So, atomic number also equals 26.

    Then, a charge of + 3 mean the element has given off 3 electrons

    this means 26 - 3 = 23

    So, the number of electrons is 23
  2. 28 August, 15:20
    0
    Al

    Explanation:

    Protons = mass number - neutrons 56-30 = 26 closest is Al 27

    Also in group 13 which loses 3 electrons to be + 3
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