Question

2 one of 118 unique substances that cannot be broken down into smaller substances and retain the characteristic of that substance
3 a weak bond between partially positively charged hydrogen atoms and partially negatively charged elements or molecules
4 describes a substance that dissolves in water; water - loving
5 describes a substance that does not dissolve in water; water - fearing

Explanation:

1. An element is a unique substance that cannot be broken - down into smaller substances while retaining its characteristic.
2. A hydrogen - bond is a weak bond between partially positively charged hydrogen atoms and partially negatively charged elements or molecules.
3. Hydrophilic substances dissolve in water and are water - loving.
4. Hydrophobic substances do not dissolve in water and are water - fearing.

Answer:

1. Element
2. Hydrogen - bond
3. Hydrophilic
4. Hydrophobic