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