bond polarity Flashcards
(8 cards)
1
Q
what is a polar covalent bond?
A
unequal sharing of electrons between two atoms resulting in formation of a dipole. (diff in EN, 2 diff atoms)
2
Q
what is a non-polar covalent bond?
A
equal sharing of electrons between two atoms. (same atom, diff in EN = 0)
3
Q
what must you include when showing a dipole moment?
A
partial charges
4
Q
how is a polar MOLECULE formed?
A
- polar bond
- not symmetrical
5
Q
what makes a molecule symmetrical?
A
- no lone pair (so not bent)
- non polar (identical atom)
6
Q
what makes a molecule assymetrical?
A
- lone pair
- different atoms around central atom
7
Q
how to identify a net dipole moment?
A
- polar bond + asymmetrical
OR - non-polar + symmetrical
8
Q
how does polarity affect reactivity?
A
greater polarity = greater reactivity
