Forces within Molecules

Question 1

Temporary dipole-dipole forces

Answer 1

Very weak and occur in all molecular substances
Attraction between nuclei in one molecule and valence electrons in another molecule.
Only intermolecular force acting in non-polar substances.

Question 2

Permanent dipole-dipole forces

Answer 2

electronegative atoms draw more electron density towards them creating a permanent dipole within the molecule. Electrostatically attracted to the opposite dipole on neighbouring molecules.

Question 3

Hydrogen bonding

Answer 3

Strongest intermolecular attraction
Occurs between molecules where H is connected to N, O or F.

Question 4

Intermolecular bonding

Answer 4

Bonding between molecules

Question 5

Intramolecular bonding

Answer 5

Bonding within a molecule

Question 6

Intramolecular covalent forces

Answer 6

Holds atoms together as molecules so they are very strong

Question 7

Intermolecular attractions

Answer 7

Hold molecules together as a solid so they are comparatively weaker

Question 8

Non polar substance melting and boiling points

Answer 8

Low because TDF are weak

Question 9

Polar substance melting and boiling points

Answer 9

Higher than non-polar but lower than ionic compounds