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6 October, 23:06

If element X has 15 protons, how many electrons does it have?

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  1. 6 October, 23:14
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    If the element has 55 protons it is celcium and it also has 55 electrons. It has an atomic mass of 133 (132.9) so to get the number of neutrons you subtract the atomic mass and the number of protons.
  2. 6 October, 23:30
    0
    If element X has 15 protons, it would also have 15 electrons.
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