Question

define valency and correlate the electronic configuration of an atom with its valency

Answer 1

The combining capacity of a atom is called valency .


for ex:; Electronic configuration of oxygen
we know that number electrons of oxygen =8
first shell (k). second shell (L). 3rd shell(M). 4 th shell (N)
2. 6

Now the valency is 2 as it needs 2 more electrons to fill the 2 nd shell

Answer 2

The electrons in the outer most small is its valency the sign depeds if it want to gain or loose electron.

Let it be carbon .

Atomic no.=6

Configuration 2,4