Chapter 4:
Formation of Compounds
Practice Test
1.
The Lewis electron-dot structure of the bromide ion shows ___________ valence electrons.
a.
eight
b.
seven
c.
one
d.
four
Hint
2.
These two elements combine to form water.
a.
hydrogen and chlorine
b.
carbon and hydrogen
c.
carbon and oxygen
d.
hydrogen and oxygen
Hint
3.
These interact when atoms react.
a.
valence electrons
b.
only s-sublevel electrons
c.
inner-level electrons
d.
neutrons
Hint
4.
The covalent compound commonly found in plastic, disposable lighters is __________.
a.
water
b.
gasoline
c.
butane
d.
carbon monoxide
Hint
5.
A sodium atom can achieve an octet by ________________.
a.
losing one electron
b.
gaining four electrons
c.
lose three electrons
d.
gaining one electron
Hint
6.
When hydrogen and oxygen react to form water, ______________.
a.
the reaction is endothermic
b.
the mass increases
c.
energy is released
d.
energy is absorbed
Hint
7.
Gasoline and oil are covalent compounds that are ______________ water.
a.
insoluble in
b.
heavier than
c.
miscible with
d.
soluble
Hint
8.
In an ionic crystal, these attract each other.
a.
positive and negative atoms
b.
positive ions
c.
positive and negative ions
d.
negative ions
Hint
9.
In general, the interparticle forces in covalent compounds are __________ those in ionic compounds.
a.
stronger than
b.
the same strength as
c.
multiples of
d.
weaker than
Hint
10.
A mystery compound dissolves in water to produce a solution that does not conduct electricity. The compound cannot be __________.
a.
ethanol
b.
sodium chloride
c.
butane
d.
benzene
Hint
11.
Molten sodium chloride conducts electricity because __________.
a. the ions are free to move
b. the chlorine atoms carry a charge
c. solid sodium conducts, too
d. chlorine gas escapes
Hint
12.
Sodium and chlorine react to produce __________.
a. sodium chlorine
b. gaseous chlorine
c. liquid sodium
d. sodium chloride
Hint
13.
These elements have almost a complete lack of chemical reactivity.
a.
noble gases
b.
alkali metals
c.
transition elements
d.
halogens
Hint
14.
Hydrogen and oxygen atoms react to form water by __________ electrons.
a.
gaining
b.
losing and gaining electrons
c.
sharing
d.
losing
Hint
15.
This compound is commonly found in all three states of matter on Earth's surface.
a.
water
b.
carbon dioxide
c.
sodium chloride
d.
iron oxide
Hint
16.
A chlorine atom attains an octet by ____________.
a.
gaining three electrons
b.
losing one electron
c.
losing five electrons
d.
gaining one electron
Hint
17.
This is a metallic element that reacts violently with water.
a.
iron
b.
silver
c.
copper
d.
sodium
Hint
18.
Limestone, calcium carbonate, is a strong building material because of the ordered arrangement of __________ in its crystal structure.
a.
atoms
b.
ions
c.
molecules
d.
covalent bonds
Hint
19.
Except for helium, this expresses the stability of a noble-gas atom's filled s and p sublevels.
a.
the sextet rule
b.
the duet rule
c.
the trio rule
d.
the octet rule
Hint
20.
Carbon dioxide is __________ in water.
a.
a solid
b.
blue
c.
soluble
d.
insoluble
Hint
