Valency, in the context of ions, refers to the magnitude of the charge on the ion. An anion is a negatively charged ion. - Nitride is the anion formed from a nitrogen atom gaining electrons to achieve a stable electron configuration. Nitrogen is in Group 15 and typically gains 3 electrons to form N³⁻. Thus, the valency of the nitride ion is -3. - Nitrate is the polyatomic anion NO₃⁻, with an overall charge of -1. - Sulphide is the anion formed from a sulphur atom gaining electrons. Sulphur is in Group 16 and typically gains 2 electrons to form S²⁻. The valency of the sulphide ion is -2. - Sulphate is the polyatomic anion SO₄²⁻, with an overall charge of -2.
Which of the following anions has a valency of –3 ?
Asked in UPSC NDA 2 2024 · Topic: Inorganic Chemistry (Chemistry of Main Group Elements (s-block and p-block))
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