Question

Is there any easy trick to learn valencies?​

Answer 1

Answer:

You should remember atomic no. first

Then it will become easy to remember valencies also.

Explanation:

It is because

Suppose you know the atomic no. of sodium that is 11

Then you can easily distribute the electrons in K ,L, M shell

Like K-2 ,L- 8, M-1

Valance electron is 1 as we received

Then if valance electron 1,2 or 3 it will donate its electron

Here sodium valency of Na is 1 because it is donating its electron.

Similarly you can easily calculate these even in your mind.

Only if have remembered the atomic number..

Answer 2

sorry

I don't know

sorry