Question

how to find the valancy of elements
​

Answer 1

Answer:

atomic number of an element divide into groups in 2,8,8,2

Answer 2

Answer:

Suppose a element..say.. Nitrogen

It's atomic no. is 7

Its electronic configuration is ..K- 2, L- 5

Now see the last shell the last has to gain 2 electrons or lose 5 electrons..to complete its octate or duplet but its difficult to lose 5 electrons so it gains 3 electrons to complete its octate

So its Valency will be ...3

THE ANSWER IS NOT COPIED FROM GOOGLE

So plzz mark me brainlest...