Chem Honors Chapter 8 And 9

Front 1

The overall charge of a formula unit for an ionic compound

Back 1

is allways zero.

Hint 1

a. is allways zero
b. is allways negative
c. is always positive
d. may have any value

Front 2

In a crystal lattice of an ionic compound,

Back 2

ions are surrounded by ions of the opposite charge.

Hint 2

a.Ions of a given charge are clustered togeatehr, far from ions of the opposite charge.
b.ions are srrounded by ions of the opposite charge.
c.a sea of electrons surrounds the ions.
d.neutral molecules are present.

Front 3

What is the relationship between lattice energy and the strength of teh attractive force holding ions in place?

Back 3

The more negative the lattice energy is, the greater the force is.

Hint 3

See page 45.

Front 4

In electron transfer involving a metallic atom and a nonmetallic atom during ion formation, which of the following is correct?

Back 4

The nonmetallic atom gains electrons from the metallic atom.

Hint 4

A. The metallic atom gains electrons from the nonmetalic atom.
B. The nonmetalic atom gains electrons from the metallic atom.
C. Both atoms gain electrons.
D. Neither atom gains electrons.

Front 5

True or false: The cyrstal lattice of ionic compuonds affects their melting and boiling points.

Back 5

True.

Front 6

True and False: The lattice energy is the energy required to separate the ions of an ionic compund.

Back 6

True

Front 7

In what form do elements such as hydrogen, nitrogen, and oxygen normally occur?

Back 7

as molecules containing two atoms.

Hint 7

a. as single atoms
b. as molecules containing two atoms
c. as molecues containing three atoms
d.as molecules containing four atoms

Front 8

How many electrons are shared in a double covalent bond?

Back 8

four

Hint 8

a. none
b. one
c. two
d. four

Front 9

Bond length is the distance between

Back 9

the nuclei of two attacthed atoms.

Hint 9

a. two molecules of the same substance.
b. the electrons in two attached atoms.
c. the nuclei of two attached atoms.
d. the orbitals of two attached atoms.

Front 10

Which of the following relationships relating to bond length is generally correct?

Back 10

the shorter the bond, the stronger the bond.

Hint 10

a. the shorter the bond, the stronger the bond.
b. the shorter the bond, the weaker the bond.
c. the shorter the bond, the fewer the electrons in it
d. the sorter the bond, the lower the bond dissociation energy.

Front 11

True or false: The prefix hepta- indicates six atoms.

Back 11

False

Hint 11

p50

Front 12

True or false: The prefix hexa- indicates six atoms.

Back 12

True

Hint 12

p50

Front 13

Prefix for 1 atom.

Back 13

mono-

Front 14

Prefix for 2 atoms.

Back 14

di-

Front 15

Prefix for 3 atoms.

Back 15

tri-

Front 16

Prefix for 4 atoms.

Back 16

tetra-

Front 17

Prefix for 5 atoms.

Back 17

penta-

Front 18

Prefix for 6 atoms.

Back 18

hexa-

Front 19

Prefix for 7 atoms.

Back 19

hepta-

Front 20

Prefix for 8 atoms.

Back 20

octa-

Front 21

Prefix for 8 atoms.

Back 21

octa-

Front 22

Prefix for 9 atoms.

Back 22

nona-

Front 23

Prefix for 10 atoms.

Back 23

deca-

Front 24

Molecular compund name of water:

Back 24

dihydrogen monoxide

Hint 24

H2O

Front 25

Molecular compund name of ammonia. (NH3)

Back 25

nitrogen trihydride

Hint 25

NH3

Front 26

An oxacid is?

Back 26

Any acid that contains hyrdrogen and an oxyanion.

Front 27

What is the molecular compund name of HBrO3?

Back 27

Bromic acid

Front 28

What is the molecular compund name of H2CO3?

Back 28

Carbonic acid

Front 29

N2O4

Back 29

Dinitrogen tetroxide

Front 30

HBr

Back 30

Hydrobromic acid

Front 31

True or false: A structural formula shows the arrangement of teh atoms in a molecule.

Back 31

True

Front 32

True or false: The electrons in a coordinate covalent bond are donated by both the bonded atoms.

Back 32

False

Front 33

The VSEPR model is used mainly to

Back 33

determine molecular shape.

Hint 33

a. determine molecular shape.
b. write resonance structures.
c. determine ionic charge.
d. measure intermolecular distances.

Front 34

The bond angle is the angle between

Back 34

two terminal atoms and the centeral atom.

Hint 34

a. the sigma and pi bonds in a double bond.
b. the nucleus and the bonding electrons.
c. two terminal atoms and the central atom.
d. the orbitals of a bonding atom.

Front 35

The shape of a molecule whose central atom has four pairs of bonding electrons is

Back 35

trigonal pyramidal

Hint 35

a. tetrahedral
b. trigonal planar.
c. trigonal pyramidal.
d. linear.

Front 36

The shape of a molecule that has two covalent single bonds and no lone pairs on teh central atom is

Back 36

linear.

Hint 36

a. tetrahedral.
b. trigonal planar.
c. trigonal pyramidal.
d. linear.

Front 37

The shape of a molecule that has three single covalent bonds and one lone pair on the central atom is

Back 37

trigonal pyramidal

Hint 37

a. tetrahedral.
b. trigonal planar.
c. trigonal pyramidal.
d. linear.

Front 38

Unequal sharing of electrons between two bonded atoms always indicates

Back 38

a polar moecule.

Hint 38

a. a nonpolar covalent bond.
b. an ionic bond.
c. a polar covalent bond.
d. a polar molecule.

Front 39

When electronegatives of two bonded atoms differ greatly, the bond is

Back 39

polar covalent.

Hint 39

a. polar covalent.
b. coodinate covalent.
c. polar covalent.
d. ionic

Front 40

Waht is the electronegativity difference that usually is the dividing line between covalent and ionic bonds?

Back 40

1.7

Hint 40

a. 1.0
b. 1.7
c. 2.7
d. 4.0

Front 41

A nonpolar covalent bond is one in which

Back 41

electrons are shared equally.

Hint 41

a. electrons are transferred.
b. electrons are shared unequally.
c. electrons are shared equally.
d. btoh electrons are provided by the same atom.

Front 42

Molecules containing only polar covalent bonds

Back 42

may or may not be polar.

Hint 42

a.are always polar.
b. may or may not be polar.
c. are always ionic.
d. are always nonpolar.

Front 43

What facvtor other than electronegativity determines whether a molecule as a whole is polar or not?

Back 43

its geometry.

Hint 43

a. temperature
b. its geometry
c. its physical state
d. its mass

Front 44

Which of the following correctly descrives the compound water, H2O?

Back 44

polar overall, with polar covalent bonds

Hint 44

a. ionic
b. nonpolar overall, with polar covalent bonds
c. polar overall, with nonpolar covalent bonds
d. polar overall, with polar covalent bonds

Front 45

Which of the following correctly describes the comopound carbon tetrachloride, CCl4?

Back 45

nonpolar overall, with polar covalent bonds.

Hint 45

a. ionic
b. nonpolar overall, with polar covalent bonds
c. polar overall, wdith nonpolar covalent bonds
d. polar overall, with polar covalent bonds

Front 46

A molecule of ammonia, NH3, is

Back 46

polar becuase there is an electronegativity difference and the molecule is trigonal pyramidal.

Hint 46

a. nonpolar becuase it is linear.
b. polar beucase it is linear.
c. nonpolar becuase there is no electronnegatvity difference.
d. polar becuase there is an electronegativity difference and the molecule is trigonal pyramidal.