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Protons = 17, electrons = 18

There are two isotopes differing in neutron number only :

  • Cl-35 (75%) having 35-17= 18 neutrons
  • Cl-37 (25%) having 37-17= 20 neutrons
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How many protons and electrons are there in a chloride ion?

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No. By definition an ion is electrically charged and so must have a different number of protons and electrons. A chloride ion has 17 protons and 18 electrons.


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