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Atoms, Molecules and Radicals — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAtoms, Molecules and Radicals1 Mark
Question
What is variable valency ? Give two examples of elements showing variable valency.
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Answer

There are some elements with more than one valency. They are said to have variable valency, e.g. Iron, copper.

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