Predict the valencies of the elements with atomic numbers 7 , 15 , 16 , 18 , 19 and justifyAlso give the formulae of hydrides formed by the above elements if any.

Predict the valencies of the elements with atomic numbers 7 , 15 , 16

1.	Predict the valencies of the elements with atomic numbers 7 , 15 , 16 , 18 , 19 and justifyAlso give the formulae of hydrides formed by the above elements if any.
Answer» SOLUTION : Since N andP need three more electrons to ATTAIN octet , their valencies are 3. Similarly , the valencies of other elements with atomic NUMBER 16 , 18 , 19 are 2 , 0 and 1 respectively. Except argon , all other elements forms hydrides. Phosphorus`- PH_(3)`, Potassium- KH Nitrogen`NH_(3)` SULPHUR`- H_(2)S` Argon does not from any COMPOUND