Chemistry

State which of the following ions or radicals given below of non-metallic elements exhibit valency: 1^-, 2^- & 3^-
(a) Chloride
(b) Bromide
(c) Iodide
(d) Nitrate
(e) Hydroxide
(f) Bicarbonate
(g) Bisulphite
(h) Bisulphate
(i) Aluminate
(j) Permanganate
(k) Oxide
(l) Sulphide
(m) Sulphite
(n) Sulphate
(o) Carbonate
(p) Dichromate
(q) Zincate
(r) Plumbite
(s) Phosphate
(t) Nitride
[write each ion or radical with the correct valency]

Valency

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Answer

Valency	Element/Radical	Ion
1^-	Chloride	Cl^1-
	Bromide	Br^1-
	Iodide	I^1-
	Nitrate	NO₃^1-
	Hydroxide	OH^1-
	Bicarbonate	HCO₃^1-
	Bisulphite	HSO₃^1-
	Bisulphate	HSO₄^1-
	Aluminate	AlO₂^1-
	Permanganate	MnO₄^1-
2^-	Oxide	O^2-
	Sulphide	S^2-
	Sulphite	SO₃^2-
	Sulphate	SO₄^2-
	Carbonate	CO₃^2-
	Dichromate	Cr₂O₇^2-
	Zincate	ZnO₂^2-
	Plumbite	PbO₂^2-
3^-	Phosphate	PO₄^3-
3^-	Nitride	N^3-

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State the valencies of the following metallic elements -
(a) Potassium
(b) Sodium
(c) Calcium
(d) Magnesium
(e) Zinc
(f) Aluminium
(g) Chromium
[write each symbol with the valency]
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