Question

75. What is valency of an element ? How does it
vary with respect to hydrogen in the third
period ?​

Answer 1

Answer:

Variation of valency w.r.t hydrogen, in a period: In representative elements, the valency increases from 1 to 4 and then decreases to 1 from left to right. Ex: Valency of 3rd period of elements: name of elementNaMgAlSiPSClValency w.r.t.H1(NaH)2(MgH2)3(AlH3)4(SiH4)5(PH3)6(H2S)7(HCl)

Answer 2

Answer:

Valency is the combining power of an element. The valency of an element is related to how many electrons are in the outer shell.