Chapter 5 Bonding Test A
Do Not Write on This Test!!! You may use a periodic table.
Multiple Choice-Identify the choice that best completes the statement or answers the question.
1) Electrons involved in bonding between atoms are
a. valence electrons
b. inside the nucleus
c. closest to the nucleus
d. positively charged
2) Each family in the periodic table has its own characteristic properties based on the number of
a. neutrons
b. valence electrons
c. protons
d. ions
3) What is the greatest number of valence electrons an atom can have? With the exception of
helium.
a. 2
b. 3
c. 8
d. 12
4) If atoms of a halogen nonmetal (Group 17) gains one electron, the atoms then have
a. no valence electrons
b. 7 valence electrons
c. 8 valence electrons
d. 17 valence electrons
5) When an atom loses an electron, it becomes a
a. positive ion
b. negative ion
c. neutral ion
d. neutral atom
6) An ionic bond is the attraction between
a. similarly charged ions
c. neutral ions
b. oppositely charged ions
d. neutral atoms
7) The element boron is directly above aluminum on the periodic table. Which statement about
boron is true?
a.
b.
c.
d.
Boron is in the same period as aluminum
Boron is in the same group as aluminum and has 5 valence electrons
Boron has 5 valence electrons and is in the same period as aluminum
Boron is in the same group as aluminum and has 3 valence electrons
8) Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the “2”
tell you?
a. Bromide has a 2 charge.
b. There are two magnesium ions to every bromide ion.
c. There are two bromide ions for every magnesium ion.
d. Bromide has a 2+ charge.
9) What is the chemical name for the compound with the formula Na2S?
a. sodium fluoride
b. magnesium sulfide
c. lithium oxide
d. sodium sulfide
10) In the chemical formula for an ionic compound, which item is written first?
a. positive ion
b. negative ion
c. subscript
d. charge
11) Which of the following is a characteristic property of ionic compounds?
a. They have low melting points.
b. They have low boiling points.
c. They form hard, brittle crystals with characteristic shapes.
d. They contain no charged particles.
12) In what form can an ionic compound conduct electricity?
a. as a solid
b. when dissolved in water
c. as a crystal
d. when warmed slightly
13) A chemical bond formed when two atoms share electrons is called a(n)
a. ionic bond
b. covalent bond
c. polyatomic bond
d. crystal bond
14) What is a double bond?
a. a bond between two atoms
b. one pair of electrons shared between two atoms
c. two pairs of electrons shared between two atoms
d. two pairs of electrons shared between four atoms
15) Which is a property shared by most covalent compounds?
a. high boiling point
b. high melting point
c. low melting point
d. good conductor of heat and electricity
16) Covalent (molecular) compounds do not conduct electricity because they
a. break up into ions.
b. do not break up into ions.
c. do not dissolve in water.
d. have high melting points.
17) If you found a carbon-13 atom, you would know that
a. it has 13 protons
b. it has 13 electrons
c. it has 13 neutrons
d. it has 7 neutrons
18) The attraction between a positive metal ion and the electrons surrounding it is a(n)
a. chemical bond
b. covalent bond
c. ionic bond
d. metallic bond
19) Which of the following terms means that metals can be hammered or pounded into thin sheets,
as in aluminum foil, or beaten into complex shapes?
a. polar
b. alloy
c. ductile
d. malleable
20) Which of the following terms means that metals can be pulled into thin strands or wires?
a. polar
b. alloy
c. ductile
d. malleable
True/False: Indicate whether the statement is true (A) or false (B).
21) The valence electrons are those electrons closest to the nucleus.
22) Each family in the periodic table has its own characteristic properties based upon its number of
valence electrons.
23) When an atom gains an electron it becomes a positive ion.
24) The attraction between a positive ion and a negative ion results in a covalent bond.
25) Orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water
are properties of ionic compounds.
26) When electrons are transferred between two atoms, a covalent bond is formed.
27) When a double bond is formed two electrons are shared.
Completion: Complete each statement by matching the word with the
statement.
A. valence
28)
29)
30)
31)
B. positive
C. equal
D. most
E. negative
Elements in Group 17 (the halogens) are the _____________ reactive nonmetals.
Elements in Group 1 lose one electron to form ions with a(n) __________ charge.
An element is stable when it has a full ______ shell.
When an ionic compound forms, the total number of positive charges and the total number of
negative charges must be____________.
Use the diagram to answer the next set of questions.
32) The group containing the
most reactive nonmetals
A. 1
B. 2
C. 13
D. 17
E. 18
33) In each period, how does the
number of electrons in each
kind of atom change from left
to right between Groups 1
and 2?
A. remains the same
B. increases by 1
C. increases by 2
D. decreases by 1
E. decrease by 2
34) In an electron dot diagram of aluminum (Al), how many dots should be drawn around the
element’s symbol?
A. 1
B. 2
C. 3
D. 4 E. 5
35) Which group of elements loses electrons most easily?
A. 1
B. 2
C. 13
D. 17
E. 18
36) Which group contains elements with two valence electrons?
A. 1
B. 2
C. 13
D. 17
E. 18
37) How many atoms of a Group 17 element would be needed to react with one atom of a Group
2 element?
A. 1
B. 2
C. 3
D. 4 E. 5
Use the table below to answer the following questions.
Name
Lithium
____?___
Calcium
Chloride
Ions and Their Charges
Charge
Symbol or Formula
_?_
Li+
1+
Na+
2+
___?__
1–
___?__
___?____
Carbonate
1–
2–
NO3
___?___
38) What is the charge for a lithium ion?
A. 3+
B. 1C. 2+
D.1+
39) What is the symbol for a calcium ion?
A. Ca 2+
B. Ca 1+
C. Ca 2-
D. Ca 3+
40) What is the chemical formula of the compound that forms when sodium and chloride
combine?
A. SCl
B. SC
C. NaCl
D. NaC
41) Which periodic table group has 2 electrons in their outer most energy level?
a. group 1 (alkaline metals)
b. group 17 (halogens)
c. group 16 (oxygen family)
d. group 2 (alkaline earth metals)
42) An element’s properties can be predicted from its
a. number of isotopes
b. location on the periodic table
c. number of neutrons
d. atomic mass
43) The atomic mass of an atom is the total number of ___ in the nucleus
a. protons and neutrons
b. protons
c. protons and electrons
d. neutrons
44) The zigzag line on the periodic table divides
a. alkali metals and transition metals
c. semimetals and transition metals
b. metals and nonmetals
d. inert gases and halogens
45) An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have a mass number of
a. 39
b. 158
c. 197
d. 276