What is the general electronic configuration of the above elements except He?

Question

The arrangement of electrons in different shells of atoms of 18th Group elements is given in the table.

Answer the following :

(i) What is the general electronic configuration of the above elements except He?

(ii) What is the valency of Argon?

(iii) Write Lewis dot structure of Neon.

(iv) Why the above elements do not take part in bond formation?

Answer 1

(i) ns2 np6

(ii) Zero

(iv) They are stable as they have 8 electrons (except Helium) in their outer most orbit.

Prepare a table that shows l, m values for n = 1, 2, 3, 4.

| n | l | ml |
| 1 | 0 | 0 |
| 2 | 0 | 0 |
| | 1 | – 1, 0, + 1 |
| 0 | 0 |
| 3 | 1 | – 1, 0, + 1 |
| 2 | – 2, – 1, 0, + 1, + 2 |
| 0 | 0 |
| 4 | 1 | – 1, 0, + 1 |
| 2 | – 2, – 1, 0, + 1, + 2 |
| 3 | – 3, – 2, – 1, 0, + 1, + 2, + 3 |