Bonding

Question 1

Intramolecular bonds are…

Answer 1

Forces of attraction found inside a molecule.

Question 2

Intermolecular bonds are…

Answer 2

Forces of attraction found between single atoms / molecules.

Question 3

Van der Waals are…

Answer 3

1. Intermolecular forces that are very weak forces of attraction.
2. London Dispersion Forces.
3. Permanent Dipole to Permanent Dipole.
4. Hydrogen Bonds.

Question 4

London Dispersion Forces (LDF) are….

Answer 4

1. A temporary uneven distribution of electrons within molecules or atoms.
2. Very weak bonds.
3. Weakest of all Van der Waal forces.
4. The greater the number of electrons, the stronger the LDF.
5. LDF increases as the atom/molecule size increases and number of electrons increases.
6. As LDF increases melting and boiling point increases

Question 5

Permanent Dipole to Permanent Dipole forces (PD to PD) are…

Answer 5

1. A permanent uneven distribution of electrons within molecules only.
2. An atom in one molecule attracts an atom in another molecule.
3. Requires a +ve and -ve side.
4. Weak forces, but stronger than LDF.

Question 6

Hydrogen Bonds are…

Answer 6

1. An example of PD to PD.
2. Molecules with N, O or F directly bonded to H have hydrogen bonding.
3. Strongest of the Van der Waal forces.
4. Raise the boiling point of a molecule substantially.
5. Present in water, ammonia, alkanoic acids, alcohols and amines.