Sodium Iodide (NaI)

* Bond type: Ionic

* Explanation: Sodium (Na) is a metal and iodine (I) is a nonmetal. Metals tend to lose electrons and nonmetals tend to gain electrons. This results in the formation of ions (Na+ and I-) held together by electrostatic attraction, forming an ionic bond.

Carbon Dioxide (CO2)

* Bond type: Molecular and Polar

* Explanation: Carbon dioxide has two polar covalent bonds between carbon and each oxygen atom. Oxygen is more electronegative than carbon, so the shared electrons are pulled closer to the oxygen atoms, creating a partial negative charge on oxygen and a partial positive charge on carbon. This makes the molecule polar.

Hydrogen Gas (H2)

* Bond type: Molecular and Nonpolar

* Explanation: Hydrogen gas is a diatomic molecule, meaning it consists of two hydrogen atoms. The bond between the two hydrogen atoms is a covalent bond. Since both atoms are the same element, they have the same electronegativity. This means the electrons are shared equally, making the molecule nonpolar.