Question

How to find valencies of elements?

Answer 1

Answer:

Good Evening.....

Hey mate here is your answer...

The valency of an atom is equal to the number of electrons in the outer shell if that number is four or less. Otherwise, the valency is equal to eight minus the number of electrons in the outer shell. Once you know the number of electrons, you can easily calculate the valency.

Hope it helps you.....

Its Shivika Tiwari.....

Answer 2

Answer:

To find the valency of an atom, you first need to know the atomic number of the element.After that arrange the atomic number in the order of 2, 8, 8 ,18 till how much is the atomic number and the final number which you obtain in that order is the valency of element.

Example- Sodium- atomic number is 11 and now by following the above pattern we get 2, 8, 1 hence the last number 1 denotes the valency of the element