Subject :NSO Class : Class 9
The outer shell electrons in compound PQ3 are shown in the given figure.
Which of the following could be the correct
representation of elements P and Q?
| P | Q | No. of neutrons in P and Q | Valency of P and Q | |
| A | Cl | N | 7 and 15 | 3 and 3 |
| B | N | Cl | 5 and 17 | 5 and 3 |
| C | P | Cl | 16 and 18 | 3 and 1 |
| D | O | F | 8 and 9 | 2 and 1 |
How to solve this