Do q2 of hots pl
Dear student,
- It is symbol used for oxygen element (O) or one atom of oxygen.
- It means two atoms of Oxygen element
- It is the symbol used for oxygen gas present in air and one mole of Oxygen gas
- 3 moles of oxygen gas is present.
- It is symbol used for Ozone layer present on the earths surface.
- It is expressing oxygen atom gaining two electrons. The valency of oxygen is -2.