Question

what name is given to the bond between different water molecules?
a ionic
b hydrogen
c nonpolar covalent
d polar covalent

Explanation:

1. Analyze Option a: Ionic bonds are formed between ions (e.g., metal and non - metal), not between water molecules. So option a is incorrect.
2. Analyze Option b: Water molecules ($H_2O$) have a polar covalent bond within the molecule (between H and O). But between different water molecules, the bond is a hydrogen bond. A hydrogen bond forms when a hydrogen atom (covalently bonded to a highly electronegative atom like O in one water molecule) is attracted to the electronegative atom (O) of another water molecule.
3. Analyze Option c: Non - polar covalent bonds are formed between atoms with equal or very similar electronegativity (e.g., in $O_2$ or $CH_4$). The bond between water molecules is not non - polar covalent. So option c is incorrect.
4. Analyze Option d: Polar covalent bonds are within a water molecule (between H and O), not between different water molecules. So option d is incorrect.

Answer:

b. hydrogen