Question

complete the table please

Answer 1

Answer:

Refer these Images please.

And Extremely Sorry if my handwriting is bad.

Hope this will help you.

Answer 2

Answer:

Required Answer:-

Sr.no. | Elements | Atomic number | Electronic conf. | Valency

i) | Maganesium | 12 | 2,8,2 | 2

ii) | Alumunium | 13 | 2,8,3 | 3

iii) | Carbon | 6 | 2,4 | 4

iv) | Beriyllium | 4 | 2,2 | 2

v) | Chlorine | 17 | 2,8,7 | 1

What is Valency:-

Valency is the number of Electronic configuration that - 2,8,6 so it will gain 2 Electron to complete its outermost shell ,, so its valency is 2

What is Electronic configuration:-

It is a division of atomic number in shells.

Hope this helps you ✌✌☺☺