Question

what is valency?...
& what is the valency of :-
a) sulphur
b) calcium

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Answer 1

Answer:

The combining capacity of an atom is called valency.

(a) Sulphur(16) = 2,8,6

Sulphur wants only 2 electrons for being stable.

so, valency of Sulphur is 2.

(b) Calcium(20) = 2,8,,8,2

Calcium wants to lose 2 electrons.

so, valency of Calcium is 2.

Answer 2

A trapezoid, also known as a trapezium, is a flat closed shape having 4 straight sides, with one pair of parallel sides. The parallel sides of a trapezium are known as the bases, and its non-parallel sides are called legs. A trapezium can also have parallel legs.

Explanation:

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