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Valency

Which of the ...

Question

Which of the following statements is incorrect regarding the valency of an element?
(a) Valency of alkali metals is 2
(b) Valency of group 18 elements is zero
(c) Valency of elements first increases till group 14 and then decreases across a period in the Modern periodic table.

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Solution

The alkali metals have one electron in their valence shell. They can easily lose this electron to attain a noble gas configuration. Therefore, the valency of alkali metals is 1.
Hence, the correct answer is option (a).

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