Question

what kind of valency do non metals generally have? answer it in detail

Answer 1

Hi there !!

The elements with valency less than or equal to 5 are non metals
When there are less than 5 electrons in the valence shell , the valency is the number of electrons in valence shell

For example : -

Carbon :-

No: of electrons = 6
Electronic configuration = 2 , 4

Here , in the valence shell , there are 4 electrons., which is less than 5

Hence , valency is 4

Therefore , it is a  non metal

Answer 2

Non-metals are those which lack all the metallic attributes. They are good insulators of heat and electricity. They are mostly gases and sometimes liquid. Some they are even solid at room temperature like, Carbon, sulfur and phosphorus.non metals valency is 5 and less than five.