x Flashcards
1
Q
electronegativity
A
ability of an atom to attract electrons in a covalent bond
2
Q
electronegativity difference in a covalent bond
A
0
3
Q
electronegativity difference in a polar covalent bond
A
0- 1.8
4
Q
electronegativity difference in an ionic bond
A
greater than 1.8
5
Q
when will a bond be non- polar?
A
- bonded atoms are the same
- bonded atoms have the same or similar electronegativity
6
Q
why is water a polar molecule?
A
- 2 O-H bonds each have a permanent dipole
- not symmetrical
- dipoles do not cancel out
7
Q
why is carbon dioxide a non-polar molecule?
A
- 2 C=O bonds each have a permanent dipole
- symmetrical molecule
- dipoles cancel out
8
Q
what are the 3 main categories of intermolecular forces?
A
- London forces
- permanent dipole- dipole interactions
- hydrogen bonds
