Midterm 3

Question 1

What is the EDG of 2 electron groups?

Answer 1

Linear

Question 2

What is the EDG of 3 electron groups?

Answer 2

Trigonal planar

Question 3

What is the EDG of 4 electron groups?

Answer 3

Tetrahedral

Question 4

What is the EDG of 5 electron groups?

Answer 4

Trigonal bipyramidal

Question 5

What is the EDG of 6 electron groups?

Answer 5

Octahedral

Question 6

What is the molecular geometry of an atom with 3 electron groups and 1 lone pair?

Answer 6

Bent (V-shaped)

Question 7

What is the molecular geometry of an atom with 4 electron groups and 1 lone pair?

Answer 7

Trigonal pyramidal

Question 8

What is the molecular geometry of an atom with 5 electron groups and 1 lone pair?

Answer 8

Seesaw (one axial lone pair)

Question 9

What is the molecular geometry of an atom with 6 electron groups and 1 lone pair?

Answer 9

Square pyramidal

Question 10

What is the molecular geometry of an atom with 4 electron groups and 2 lone pairs?

Answer 10

Bent (V-shaped)

Question 11

What is the molecular geometry of an atom with 5 electron groups and 2 lone pairs?

Answer 11

T shaped (two axial lone pairs)

Question 12

What is the molecular geometry of an atom with 6 electron groups and 2 lone pairs?

Answer 12

Square planar

Question 13

What is the molecular geometry of an atom with 5 electron groups and 3 lone pairs?

Answer 13

Linear (3 axial lone pairs)

Question 14

What is the bond angle of a linear molecular geometry?

Answer 14

180

Question 15

What is the bond angle of a Trigonal planar molecular geometry?

Answer 15

120

Question 16

What is the bond angle of a bent (v-shaped) molecular geometry?

Answer 16

Less than 120

Question 17

What is the bond angle of a tetrahedral molecular geometry?

Answer 17

109.5

Question 18

What is the bond angle of a trigonal pyramidal molecular geometry?

Answer 18

Less than 109.5

Question 19

What is the bond angle of a bent (v-shaped) molecular geometry (steric number 4)?

Answer 19

Less than 109.5

Question 20

What are the bond angles of a Trigonal bipyramidal molecular geometry?

Answer 20

90 from axial, 120 around center plane

Question 21

What are the bond angles of a see-saw molecular geometry?

Answer 21

Less than 120 degrees

Question 22

What are the bond angles of a T-shaped molecular geometry?

Answer 22

Less than 90 degrees

Question 23

What are the bond angles of a linear molecular geometry (steric number 5)?

Answer 23

180

Question 24

What is the bond angle of an octahedral molecular geometry?

Answer 24

90

Question 25

Does an sp2 sp2 overlap develop into a sigma or pi bond?

Answer 25

Sigma

Question 26

Does an sp2 1s overlap develop into a sigma or pi bond?

Answer 26

Sigma

Question 27

What causes an pi bond?

Answer 27

Electrons in unhybridized orbitals (p orbitals) overlapping

Question 28

What is the order of energy of MOs?

Answer 28

Sigma < pi < pi star < sigma star

Question 29

Which elements use the inverted MO scheme?

Answer 29

Li, Be, B, C, or N

Question 30

Constructive interference generates

Answer 30

Bonding orbitals

Question 31

Destructive interference generates

Answer 31

Non bonding or anti bonding orbitals

Question 32

The closer in energy AOs are

Answer 32

The more they mix to form MOs

Question 33

Higher ___ means more stability

Answer 33

Q, ionic charge

Question 34

What is the origin of hypervalency?

Answer 34

Atom size

Question 35

What two orbitals are in the sp hybrid?

Answer 35

Ns and Npz

Question 36

What orbitals are in the sp2 hybrid

Answer 36

Ns, npx, and npy

Question 37

In bonding orbitals, the bigger orbital is on the ___ EN atom

Answer 37

More

Question 38

In antibonds, the bigger orbital is on the ___ EN atom

Answer 38

Less