CSEC Chemistry · May/June 2016 · Paper 1 · Question Q29
In the following diagram, X represents the symbol of a positive ion:
^{40}_{20}\text{X}^{2+}
Which of the following pairs represents the number of neutrons and electrons in X?
| | Number of Neutrons | Number of Electrons |
|---|---|---|
| (A) | 20 | 18 |
| (B) | 20 | 20 |
| (C) | 60 | 18 |
| (D) | 60 | 20 |
- (A)Neutrons: 20, Electrons: 18
- (B)Neutrons: 20, Electrons: 20
- (C)Neutrons: 60, Electrons: 18
- (D)Neutrons: 60, Electrons: 20
The answer is shown once you've answered.
Practise this question