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Atoms, Molecules and Radicals — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAtoms, Molecules and Radicals1 Mark
Question
Name three elements each whose ions have valency +1, +2 and +3 respectively
✓

Answer

+1 = Hydrogen, Sodium, Potassium.
+2 = Calcium, Magnesium, Zinc.
+3 = Aluminium, Chromium, Ferric [Fe (III)]

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