Ch 26

Question 1

Intramolecular bonds hold

Answer 1

Atoms together as molecules

Question 2

Intramolecular bonds include

Answer 2

Covalent and ionic bonds

Question 3

Lithium bonds to form how many valence electrons

Answer 3

Two

Question 4

Beryllium bonds to form how many valence electrons

Answer 4

Four

Question 5

Boron bonds to form how many valence electrons

Answer 5

Six

Question 6

Elements beyond the second row can

Answer 6

Expand octets to include more than eight electrons

Question 7

Ionic compounds form crystal lattices consisting of

Answer 7

Arrays of positive and negative ions

Question 8

Ionic compounds have high melting and boiling points due to

Answer 8

Strong electrostatic forces between the ions

Question 9

Ions can conduct electricity in what state?

Answer 9

Liquid / aqueous

Question 10

Covalent bonds have low melting points and can’t

Answer 10

Conduct electricity in the liquid or aqueous states

Question 11

What features characterize covalent bonds?

Answer 11

Bond length and bond energy

Question 12

What is bond order?

Answer 12

The number of shared electron pairs between two atoms

Question 13

What is the average distance between the two nuclei of atoms in a bond

Answer 13

Bond length

Question 14

A triple bond is shorter than

Answer 14

Double bond

Question 15

A double bond is shorter than

Answer 15

Single bond

Question 16

Bond energy is the energy

Answer 16

Required to separate two bonded atoms

Question 17

The strength of a bond (and bond energy) increases as the

Answer 17

Number of shared electron pairs increases

Question 18

H has how many valence electrons

Answer 18

1

Question 19

C has how many valence electrons

Answer 19

4

Question 20

N has how many valences electrons

Answer 20

5

Question 21

What atoms usually are the end electrons?

Answer 21

H, F, Cl, Br, I

Question 22

What is the equation for formal charge?

Answer 22

V - (number of dots + number of sticks)

Question 23

Formal charges are used to

Answer 23

Assess stability of particular resonance structure

Question 24

A stable Lewis structure consists of

Answer 24

Negative charges on most electronegative atoms

Question 25

Atoms found in or beyond the third period can have

Answer 25

More than eight valence electrons

Question 26

Atoms found in or beyond the third period can be assigned

Answer 26

More than four bonds

Question 27

The nature of a covalent bond depends on

Answer 27

The relative electronegativities of atoms sharing electron pairs

Question 28

Nonpolar covalent bonding occurs between

Answer 28

Same electronegativities

Question 29

What is a Lewis Acid?

Answer 29

Compound that can accept an electron pair

Question 30

What is a Lewis Base?

Answer 30

Compound that can donate an electron pair

Question 31

Tetrahedral structures are usually

Answer 31

Nonpolar

Question 32

Angular structures are usually

Answer 32

Polar

Question 33

l describes what within n shells

Answer 33

The orbitals

Question 34

S orbitals are

Answer 34

Spherically symmetric

Question 35

P orbitals have what shapes

Answer 35

Dumbbell

Question 36

Bonding orbitals are formed when

Answer 36

Two atomic orbitals are in phase

Question 37

Antibonding orbitals are formed when

Answer 37

Two atomic orbitals are not in phase

Question 38

What bonds are formed when two orbitals of different atoms overlap head-to-head

Answer 38

Sigma bonds

Question 39

What bonds are formed when two p parallel orbitals interact

Answer 39

Pi bonds

Question 40

``` Rate strength of: Dipole-ion Dipole-dipole Hydrogen Bonds London Forces ```

Answer 40

Dipole-ion > HB > dipole-diple > London Forces