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8th Chapter 4 Chemical Bonds
Test Description: Review material for Chapter 4: Chemical bonds
Instructions: Answer all questions to get your test result.
1) Which of the following conducts electricity?
A
sugar dissolved in water
B
sugar crystals
C
salt crystals
D
salt dissolved in water
2) Which type of the following describes a covalent bond?
A
Atoms transfer one or more pairs of eletrons
B
alternating ions that are oppositely charged
C
Atoms equally share one or more pairs of electrons
3) Which molecule is held together by a covalent bond?
A
CaO
B
Cl2
C
NaCl
D
MgO
4) Which of the following properties causes the mineral halite to break apart along a flat face?
A
alternating positive and negative ions
B
Color
C
hardness
D
covalently bonded atoms
5) What is an atom or group of atoms called when it holds an electrical charge?
A
crystal
B
neutron
C
ion
D
compound
6) An ionic bond forms when
A
an electron is transferred between two atoms
B
two atoms lose electrons
C
two atoms gain electrons
D
two atoms share electrons
7) How many sodium ions (Na+) are needed to balance the charge on a hydroxide ion (OH-)
A
4
B
3
C
2
D
1
8) An orderly 3-D arrangement of particles is a(n)
A
ion
B
molecule
C
atom
D
crystal
9) What type of ions are composed of more than one atom?
A
Polar
B
Molecular
C
Polyatomic
D
Covalent
10) What type of bond shares 4 electrons?
A
Quadruple bond
B
Triple bond
C
Double bond
D
Single bond
11) When an atom loses an electron, it
A
becomes a positive ion
B
forms a covalent bond
C
gains protons
D
becomes a negative ion
12) Which of these is a property of an ionic compound?
A
shared electrons
B
crystal shape
C
low melting point
D
poor conductor of electricity
13) A bond in which a pair of electrons is shared between two atoms is called
A
polyatomic
B
triple bond
C
covalent
D
ionic
14) Fluorine atoms can not form a double or triple bond because flourine
A
is a nonmetal
B
strongly attracts electrons
C
is a gas at room temperature
D
has 7 valence electrons
15) An ionic crystal splits along a face of
A
unlike charges
B
molecules
C
random ions
D
like charges
16) The force of the attraction of electrons to the atom is measured by
A
moles
B
Paulings
C
Kilowatts
D
AMUs
17) When one nitrogen atoms joins with another the result is a
A
double bond
B
single bond
C
ionic bond
D
triple bond
18) When nitrogen and hydrogen combine, the ratio of hydrogen atoms to nitrogen atoms in a molecule of the resulting compound is
A
1 to 2
B
3 to 1
C
1 to 1
D
2 to 1
19) Atoms of which pair of elements are most likely to form a polar covalent compound?
A
Na and O
B
Na and Cl
C
Cl and Cl
D
H and O
20) The correct symbol for an ION of oxygen is
A
O2+
B
O-
C
O2-
D
O+
*select an answer for all questions
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