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14 October, 15:56

How many protons do the following have?

Calcium

Gold

Copper

Iron

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Answers (1)
  1. 14 October, 17:42
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    Calcium = 20 protons

    Gold = 79 protons

    Copper = 29 protons

    Iron = 26 protons

    Explanation:

    Atomic Number = #protons and neutrons

    Calcium (Ca)

    Atomic Number: 20

    Protons: 20

    Gold (Au)

    Atomic Number: 79

    Protons: 79

    Copper (Cu)

    Atomic Number: 29

    Protons: 29

    Iron (Fe)

    Atomic Number: 26

    Protons: 26
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