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Unit - 4.1 Atomic Structure — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYUnit - 4.1 Atomic Structure1 Mark
Question
Name two elements each, whose ions have valency +1, +2 and +3 respectively.
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Answer

- 1 = Hydrogen, Sodium, Potassium.
- 2 = Calcium, Magnesium, Zinc
- 3 = Aluminum, Chromium, Ferric

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