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Chemistry First Semester Practice Exam
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Chemistry First Semester Practice Exam
Multiple Choice Questions
1) What is the approximate total number of atoms in 1.0
mole of lithium?
23
(a) 1.0 × 10
(b) 6.0 × 1023
(c) 3.0
(d) 6.9
2) In which list can all particles be accelerated by an electric field?
(a) alpha particles, beta particles, and neutrons
(b) alpha particles, beta particles, and protons
5) Given the nuclear equation:
14
16
2
N+X→
O+
H
7
8
1
What is particle X?
(a) an alpha particle
(c) a deuteron
(b) a beta particle
(d) a triton
6) Which type of radiation is most similar to high-energy
x rays?
(c) alpha particles, protons, and neutrons
(d) beta particles, protons, and neutrons
3) Which reaction is matched correctly with the particle
represented by letter X ?
(a)
226
222
Ra →
Rn + X; X is an alpha particle.
88
86
(b)
234
Th →
90
234
Pa + X; X is an alpha particle.
91
(c)
230
226
Th →
Ra + X; X is a beta particle.
90
88
(d)
234
230
U →
Th + X; X is a beta particle.
92
90
(a) alpha
(c) neutron
(b) beta
(d) gamma
7) Which type of bond exists between an atom of carbon
and an atom of fluorine?
(a) ionic
(c) polar covalent
(b) metallic
(d) nonpolar covalent
8) At which location in the Periodic Table would the most
active metallic element be found?
(a) in Group 1 at the top
(b) in Group 1 at the bottom
(c) in Group 17 at the top
4) Within Period 2 of the Periodic Table, as the atomic
number increases, the atomic radius generally
(a) decreases
(b) increases
(d) in Group 17 at the bottom
(c) remains the same
9) Given the reaction:
2C2 H2 (g) + 5O2 (g) → 4CO2 (g) + 2H2 O(g)
What is the total number of grams of O2 (g) needed to
react completely with 0.50 mole of C2 H2 (g)?
(a) 10. g
(c) 80. g
(b) 40. g
(d) 160 g
16) 24 grams of carbon equals how many moles?
10) Given the unbalanced equation:
N2 (g) +
O2 (g) →
N2 O5 (g)
When the equation is balanced using smallest whole
numbers, the coefficient of N2 (g) will be
(a) 1
(b) 2
(a)
(b)
(c)
(d)
1
2
3
4
(c) 5
(d) 4
17) Which properties are most common in nonmetals?
11) Which atom will form an ionic bond with a Br atom?
(a) low ionization energy and low electronegativity
(b) low ionization energy and high electronegativity
(a) N
(b) Li
(c) O
(d) C
12) Which atoms are isotopes of the same element?
(a)
24
25
X and
X
12
12
(b)
20
20
X and
X
10
11
(c)
31
32
X and
X
15
16
(d)
31
31
X and
X
19
19
(c) high ionization energy and low electronegativity
(d) high ionization energy and high electronegativity
18) Which shows the correct Lewis structure for H2 O?
(a)
H
O
H
H
(b)
O
H
13) Given the equation:
H2 (g) + Cl2 (g) → 2HCl(g)
What is the total number of moles of HCl(g) produced
when 3 moles of H2 (g) is completely consumed?
(a) 5 moles
(b) 2 moles
(d)
H O H
H
O
H
(c) 3 moles
(d) 6 moles
14) According to the periodic table, which of the following
elements most readily loses an electron?
(a)
(b)
(c)
(d)
(c)
F
Ne
Li
C
19) The forces between atoms that create chemical bonds
are the result of interactions between
(a) nuclei
(b) electrons
(c) protons and electrons
(d) protons and nuclei
20) Which molecule exhibits covalent bonding?
15) What is the total number of neon atoms contained in
20.2 grams of neon gas?
(a) 1.01 × 1024
(b) 2.02 × 1024
(c) 3.01 × 1023
(d) 6.02 × 1023
(a)
(b)
(c)
(d)
LiF
CO2
KBr
CaCl2
21) Which pair of atoms is held together by a covalent
bond?
(a) HCl
(b) LiCl
26) How are protons held together in the nucleus of an
atom?
(a) Nuclear forces
(b) Electromagnetic attraction
(c) NaCl
(d) KCl
(c) Electromagnetic repulsion
(d) Rotational inertia
22) Given the reaction:
226
222
Ra →
Rn + X
88
86
Which type of emanation is represented by X?
(a) alpha particle
(c) proton
(b) beta particle
(d) positron
27) As the elements of Group l are considered in order
from top to bottom, the first ionization energy of each
successive element will
(a) decrease
(b) increase
23) Which list is in order of increasing penetrating
strength?
(a) Alpha, gamma, beta
28) What is the total number of molecules in a 0.5-mole
sample of He gas?
(a) 6 × 1023
(b) 2 × 1023
(b) Alpha, beta, gamma
(c) remain the same
(c) 3 × 1023
(d) 4 × 1023
(c) Gamma, alpha, beta
(d) Gamma, beta, alpha
29) Which elements are both classified as metalloids?
24) The atomic mass unit is defined as exactly
of an atom of
1
12
(a)
12
C
6
(c)
24
Mg
12
(b)
14
C
6
(d)
26
Mg
12
the mass
(a) Ge and As
(b) Bi and Po
30) Which pair of atoms will share electrons when a bond
is formed between them?
(a) Ba and I
(b) Br and CI
25) In a salt crystal, NaCl, how does the number of positive sodium ions compare with the number of negative
chloride ions?
(a) The number of positive ions is less than the number of negative ions.
(b) The number of positive ions is more than the number of negative ions.
(c) The number of positive ions is equal to the number
of negative ions.
(c) B and C
(d) Si and P
(c) K and CI
(d) Li and I
31) Which bond exists between the atoms in a water
molecule?
(a)
(b)
(c)
(d)
Ionic
Covalent
Ionic and covalent
Hydrogen
(d) It depends on the particular crystal.
32) Which particles may be gained, lost, or shared by an
atom when it forms a chemical bond?
(a) protons
(c) neutrons
(b) electrons
(d) nucleons
33) Which element in Group 1 has the greatest tendency
to lose an electron?
(a) cesium
(c) potassium
(b) rubidium
(d) sodium
34) Given the reaction:
4Al(s) + 3O2 (g) → 2Al2 O3 (s)
What is the minimum number of grams of oxygen gas
required to produce 1.00 mole of aluminum oxide?
(a) 32.0 g
(c) 96.0 g
(b) 48.0 g
(d) 192 g
40) In which set do the elements exhibit the most similar
chemical properties?
(a) N, O, and F
(b) Hg, Br, and Rn
(c) Li, Na, and K
(d) Al, Si, and P
41) Which subatomic particle is found in the nucleus of
all isotopes of hydrogen?
(a) proton
(c) electron
(b) neutron
(d) positron
42) In the equation
234
234
Th →
Pa + X the symbol
90
91
X represents
35) What is the total number of valence electrons in an
atom of boron in the ground state?
(a) 1
(b) 7
(c) 3
(d) 5
36) What is the total number of protons and neutrons in
86
an atom of
Rb?
37
(a) 37
(b) 49
(c) 86
(d) 123
37) Which type of radiation has zero mass and zero
charge?
(a) alpha
(c) neutron
(b) beta
(d) gamma
38) The elements known as the alkaline earth metals are
found in Group
(a) 1
(b) 2
(c) 16
(d) 17
39) Atoms of which element have the weakest attraction
for electrons?
(a) Na
(b) P
(c) Si
(d) S
(a)
0
e
+1
(c)
1
n
0
(b)
0
e
−1
(d)
1
H
1
43) What is the total number of moles of sulfur atoms in
1 mole of Fe2 (SO4 )3 ?
(a) 1
(b) 15
(c) 3
(d) 17
44) Given the unbalanced equation.
CaSO44 +
AlCl3 →
Al2 (SO4 )3 +
CaCl2
What is the coefficient of Al2 (SO4 )3 when the equation is completely balanced using the smallest wholenumber coefficients?
(a) 1
(b) 2
(c) 3
(d) 4
45) Atoms of which set of elements all exhibit the same
oxidation state?
(a)
(b)
(c)
(d)
actinoid series
metalloids
alkaline earth metals
transition metals
46) Which noble gas has the highest first ionization energy?
(a) radon
(b) krypton
(c) neon
(d) helium
47) Which statement explains why fusion reactions are difficult to initiate?
(a) Positive nuclei attract each other.
(b) Positive nuclei repel each other.
(c) Neutrons prevent nuclei from getting close enough
to fuse.
(d) Electrons prevent nuclei from getting close enough
to fuse.
48) Which statement describes the elements in Period 3?
49) Which electron dot symbol represents the atom in Period 4 with the highest first ionization energy?
(a)
(c)
(b)
(d)
50) If M represents an alkali metal, what is the formula
for the compound formed by M and oxygen?
(a) MO2
(b) M2 O
(c) M2 O3
(d) M3 O2
51) What is the charge and mass of a proton?
(a) Each successive element has a greater atomic radius.
(b) Each successive element has a lower electronegativity.
(c) charge of -1 and mass of 1 amu
(c) All elements have similar chemical properties.
(d) charge of -1 and mass of
(d) All elements have valence electrons in the same
principal energy level.
(a) charge of +1 and mass of 1 amu
(b) charge of +1 and mass of
1
1836
1
1836
amu
amu
Chemistry First Semester Practice Exam
Batten
Answer Key
Multiple Choice Questions
1) b
2) b
3) a
4) a
5) a
6) d
7) c
8) b
9) b
10) b
11) b
12) a
13) d
14) c
15) d
16) b
17) d
18) d
19) c
20) b
21) a
22) a
23) b
24) a
25) c
26) a
27) a
28) c
29) a
30) b
31) b
32) b
33) a
34) b
35) c
36) c
37) d
38) b
39) a
40) c
41) a
42) b
43) c
44) a
45) c
46) d
47) b
48) d
49) d
50) b
51) a