- Methane (CH₄): Methane is a simple hydrocarbon molecule composed of one carbon atom and four hydrogen atoms. The carbon atom shares its four valence electrons with the four hydrogen atoms, forming four covalent bonds.
- Water (H₂O): Water is a molecule composed of two hydrogen atoms and one oxygen atom. The two hydrogen atoms share their valence electrons with the oxygen atom, forming two covalent bonds.
- Diamond: Diamond is a crystalline form of carbon where each carbon atom is covalently bonded to four other carbon atoms, forming a strong and rigid structure.
