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