5.8 + 5.9 Flashcards Preview

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Flashcards in 5.8 + 5.9 Deck (16):
1

valence-shell electron-pair repulsion theory (VSEPR)

electron groups around central atom as far apart as possible

2

how can shape of an electron be determined?

# of lone groups and bonding groups
VSEPR theory

3

linear
# of electron groups
bond angle

2 electron groups
180- bond angle

4

trigonal planar
# of electron groups
bond angle

3 electron groups
bond angle- 120

5

bent (120)
# of electron groups
bond angle

3 electron groups (2 bonding groups+ 1 lone pair)
bond angle- 120

6

tetrahedral
# of electron groups
bond angle

4 electron groups
bond angle 109

7

pyramidal
# of electron groups
bond angle

3 electron groups
bond angle 109

8

bent 109
# of electron groups
bond angle

4 electron groups (2 bonding groups, 2 lone pairs)
bond angle- 109

9

nonpolar molecule are classifies as (2 ways)

non polar bonds
symmetrical arrangement of polar bonds

10

ionic bonds require high/low energy to break and the bonds are strong/weak

high; strong

11

covalent bonds are strong/weak and require high/low energy to break

weak; low

12

what are the 3 types of covalent bonds?

dipole-dipole
hydrogen
dispersion

13

dipole-diple attraction

attractive forces formed between polar molecules

14

hydrogen bond
(between what elements?)

strong dipole attraction between hydrogen molecule of one molecule and a lone pair on nitrogen, oxygen or fluorine

15

dispersion forces

weak attraction between non polar molecules

16

how are dispersion forces formed?

a temporary dipole is created