All three molecules contain ionic bonds.All three molecules contain covalent bonds.Methane has ionic bonds and oxygen has covalent bonds.Nitrogen has ionic bonds and methane has covalent bonds.

It seems like there's a misunderstanding in your statements. Let's clarify:

1. Methane (CH4), Oxygen (O2), and Nitrogen (N2) are all molecules that contain covalent bonds, not ionic bonds.

2. In a covalent bond, electrons are shared between atoms to fill their outer shells. This is the case in all three of these molecules.

3. Methane is a molecule formed by one Carbon atom sharing its 4 electrons with 4 Hydrogen atoms.

4. Oxygen is a molecule formed by two Oxygen atoms sharing their 6 outer shell electrons with each other to complete their outer shells.

5. Nitrogen is a molecule formed by two Nitrogen atoms sharing their 5 outer shell electrons with each other to complete their outer shells.

6. Ionic bonds, on the other hand, involve the transfer of electrons from one atom to another, resulting in positively and negatively charged ions that attract each other. This is not the case in any of these three molecules.