After transferring the electron, which ion is negatively charged? Why is the ion negatively charged? Write the symbol for the negative ion: -

After transferring an electron, the ion that lost an electron, assuming it was neutral before, would be a cation. The atom that gained an electron would be an anion.

The ion is negatively charged because it has gained an ion, adding a negative charge to the atom's neutral state. Because it has no protons to cancel the charge, it gains 1 negative charge, making it an anion.

The symbol for a negative ion would be (-) and a positive would be (+)

For example, when oxygen is an ion, here's how it would look: O2-

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