Atomic Composition of an Ion

Rarely Tested

For ion $$_Z^A X^{c\pm}$$:

  • Protons = $$Z$$
  • Neutrons = $$A - Z$$
  • Electrons = $$Z - c$$ (for $$c+$$ cation) or $$Z + |c|$$ (for $$c-$$ anion)
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