hydrogen, oxygen 2 hydrogen, 1 oxygen 2 hydrogen, 2 oxygen
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What atoms combine to make up a molecule of water? 1. 1 hydrogen, 1 oxygen 2.
Possibilities:
- hydrogen,
- oxygen
- 2 hydrogen, 1 oxygen
- 2 hydrogen, 2 oxygen

2 hydrogen, 1 oxygen