Intermolecular Forces Flashcards
1
Q
Van der Waals - 3 points
A
-between all atoms and molecules
-molecules become polarised
-temporary attraction
2
Q
Permanent dipole-dipole - 2 points
A
- molecules are already polar
- opposite chrages = permanetly attracted
3
Q
Hydrogen bonds - 2 points
A
- always dipole dipole aswell
- only between hydrogen and NOF atoms (nitrogen, oxygen and flourine)
4
Q
What is the strongest intermolecular force?
A
hydrogen bonds
5
Q
What is the weakest intermoleular?
A
van der waals
6
Q
How is a van der waals force formed? - 5 points
A
- electrons are always moving quickly
7
Q
How is a dipole-dipole force formed? - 3 points
A
- atoms are already polar
- opposite charges are permanently attracted
- permenant bond as electrons do not move constantly
