Answer:
1. polar covalent bond
2. electronegativity
3. hydrogen bonding
4. nonpolar covalent bond
Step-by-step explanation:
1. A type of covalent bond where electrons are shared unequally. polar covalent bond. In this kind of bond, there is a negative charge density over the more electronegative atom and a positive charge density over the less electronegative atom.
2. The tendency of an atom to attract electrons towards itself. electronegativity. Atoms with higher electronegativity have a higher tendency to attract electrons towards itself.
3. A bond that forms between an electronegative atom and a hydrogen atom with a positive dipole. hydrogen bonding. This is an especially strong kind of dipole-dipole interaction.
4. A type of covalent bond where electrons are shared equally. nonpolar covalent bond. Atoms have the same (or similar) electronegativity so the electrons are shared equally.