7. Write True for the true statement and False for the false one.
(d). The valency of sodium is 1.

True

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False

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Solution

The correct option is A True
Element Electronic configuration Valency
Sodium $(Na)$ 2,8,1 1
Therefore, the valency of sodium is 1.
Hence, the given statement is true.

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Element	Electronic configuration	Valency
Sodium $(Na)$	2,8,1	1