AS: Shapes Of Molecules

Question 1

Bond Angle: NO lone pairs?

Answer 1

109.5

E.g. NH4+

Question 2

Bond Angle: 1 LONE PAIR?

Answer 2

107 degrees

E.g. NH3

Question 3

Bond Angles: 2 LONE PAIRS and EXAMPLE?

Answer 3

104.5 degrees

E.g. Water

Question 4

Name: 2 electron pairs on Central Atom and example

Answer 4

Linear

180 degrees

BeCl2

MS: 2 BONDS REPEL EQUALLY

Question 5

Name: 3 electron pairs on Central Atom

Answer 5

No LONE pairs: BF3 : Trigonal Planar

1 LONE pair: SO2 : Non-Linear/Bent

                  120 degrees

Question 6

Name: 4 electron pairs on Central Atom

Answer 6

No LONE pairs: NH4+ : Tetrahedral

1 LONE pair: Trigonal Pyramidal

2 LONE pairs: Non-Linear/Bent

Question 7

Name: 5 electron pairs on Central Atom

Answer 7

No LONE pairs: PCl5 : Trigonal bipyramidal

Question 8

Name: 6 electron pairs on Central Atom

Answer 8

No LONE pairs: SF6 : Octahedral

Question 9

Describe the Valence-Shell Electron-Pair Repulsion Theory

Answer 9

1) LP - LP = bond angles BIGGEST
2) LP - BP = bond angles 2nd BIGgest
3) BP - BP = bond angles smallest

Question 10

Degrees: Trigonal Planar?

And, with a lone pair?

Answer 10

120 degrees because the EXTRA ELECTRON DENSITY cancels out EXTRA REPULSION from the lone pair

Question 11

Degrees: Tetrahedral

1 LONE PAIR
2 LONE PAIRS

Answer 11

109.5
107
104.5

Question 12

Degrees: Trigonal BiPyramidal?

Answer 12

90 between Cl

120 between wedge & dotted

Question 13

Degrees: Octahedral?

Answer 13

90 degrees

Question 14

Why does TlCl2 + ion have a linear shape?

Answer 14

two bonds (PAIRS of ELECTRONS) repel EQUALLY