- H2O (Water): Water is a molecule composed of two hydrogen atoms and one oxygen atom. The oxygen atom shares two of its electrons with each of the hydrogen atoms, forming a covalent bond between each hydrogen and oxygen atom.
- CO2 (Carbon Dioxide): Carbon dioxide is a molecule composed of one carbon atom and two oxygen atoms. The carbon atom shares two of its electrons with each of the oxygen atoms, forming a covalent bond between each carbon and oxygen atom.
- CH4 (Methane): Methane is a molecule composed of one carbon atom and four hydrogen atoms. The carbon atom shares four of its electrons with each of the hydrogen atoms, forming a covalent bond between each carbon and hydrogen atom.
- C2H6 (Ethane): Ethane is a molecule composed of two carbon atoms and six hydrogen atoms. The two carbon atoms share four electrons with each other to form a carbon-carbon covalent bond. Each carbon atom shares its remaining three electrons with three hydrogen atoms, forming three covalent bonds between each carbon and hydrogen atom.
