Q. The atomic number of oxygen is 8, The total number of electrons in the O²- on is.
- 10
- 6
- 8
- 9
Answer: 10
Take Mock Tests
| Government Schemes Mock Test | Start Test! |
| Political Science Mock Test – 42 | Start Test |
| History Test – 190 | Start Test |
| Quantitative Aptitude Test | Start Test! | Data Interpretation - Mock Test | Start Test! |
| General Awareness - Mock Test | Start Test! |
| Reasoning Ability - Mock Test | Start Test! |
We will be happy to hear your thoughts