Question

important the valency of metal and non-metal​.

Answer 1

Answer:

either metals or non-metals. D. always non-metals. Hint: Valency can be 1 in two cases, one is when the number of electrons in the outermost shell are 1 and the other case is when the electrons in the outermost shell are 7.

Explanation:

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Answer 2

Answer:

elements can be divided into metals and nonmetals and it is important to know whether a particular element is a metal or nonmetal. Metals (like copper and aluminium) are good conductors of heat and electricity, while nonmetals (such as phosphorus and sulfur) are insulators.