* Covalent bonds: These are the primary bonds holding the molecule together. Each carbon atom forms four covalent bonds, while each hydrogen atom forms one. The carbon atoms are linked to each other in a chain, and each carbon atom is also bonded to hydrogen atoms.

* Van der Waals forces: These are weak intermolecular forces that exist between butane molecules. They arise from temporary fluctuations in electron distribution, creating temporary dipoles. These forces contribute to the physical properties of butane, such as its melting point and boiling point.

Here's a breakdown:

* Carbon-Carbon (C-C) bonds: These are single covalent bonds.

* Carbon-Hydrogen (C-H) bonds: These are also single covalent bonds.

Let me know if you'd like to know more about covalent bonds or Van der Waals forces!