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Regents Chemistry Midterm Review
Regents Chemistry Midterm Review
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1
Which list consists of elements that have the most similar chemical properties?
Mg, Al, and Si
K, Ca, and Ga
Mg, Ca, and Ba
K, Al, and Ni
2
Which phase change represents sublimation?
H2O(l) → H2O(g)
H2O(l) → H2O(s)
I2(s) → I2(g)
I2(s) → I2(l)
3
What does the following diagram represent?
fission
fusion
alpha decay
beta decay
4
Which is an empirical formula?
CH
C4H8
C2H4
C2H2
5
A sample of and a sample of differ in their
chemical compositions
physical properties
empirical formulas
molecular structures
6
Which formula represents a mixture?
NaCl (s)
Na (l)
Na (s)
NaCl (aq)
7
I-131 and I-128 have...
a different number of electrons and neutrons
a different number of electrons but same number of neutrons
the same number of protons and neutrons
the same number of protons but different number of neutrons
8
Which compound contains ionic bonds?
CO2
CO
Na2O
N2O
9
Which elements are present in this mixture?
D, E, G
E and D
E and G
D and G
10
Which liquid has the lowest vapor pressure at 65°C?
propanone
ethanol
water
ethanoic acid
11
Which element is an alkaline Earth metal?
Barium
Arsenic
Iron
Sodium
12
Which conclusion was a direct result of the gold foil experiment?
An electron has a positive charge and is inside the nucleus
An atom is mostly empty space with a dense, positive nucleus
An electron has properties of both waves and particles.
An atom is composed of at least three subatomic particles
13
When 200 g of water cools from 50.°C to 25°C, the total amount of energy released is
21 kJ
17 kJ
42 kJ
34 kJ
14
In an orbital, there is a high probability of finding...
a proton
a neutron
a beta particle
an electron
15
The burning of magnesium involves a conversion of
chemical energy to mechanical energy
chemical energy to heat energy
heat energy to mechanical energy
heat energy to chemical energy
16
The temp of 100. g of H
2
O changes from 16.0ºC to 20.0ºC. What is the Joules of heat absorbed?
168
1680
105
420
17
Which set of values represents standard pressure and standard temperature?
101.3 atm and 273°C
101.3 kPa and 0°C
1 kPa and 273 K
1 atm and 101.3 K
18
_________________ →
4
2
He +
206
82
Pb ; the missing particle is
Pb-202
Po-210
At-210
Hg-202
19
Which formula represents the compound aluminum iodide?
Al3I
AlI
AlI3
Al3I3
20
Heat will flow spontaneously from a sample of gold at 60°C to a sample that has a temp. of
500C
800C
600C
700C
21
Which of the following elements has the most metallic characteristics?
Fluorine
Iron
Rubidium
Strontium
22
A gas has a vol. of 50.0 mL. The P on gas is 0.90 atm + temp is 298 K. What is the vol.at STP?
41 mL
49 mL
51 mL
55 mL
23
A real gas behaves more like an ideal gas when the gas molecules are
far apart and have weak attractive forces between them
close and have weak attractive forces between them
far apart and have strong attractive forces between them
close and have strong attractive forces between them
24
The temperature of a sample of matter is a measure of the
total kinetic energy of the particles in the sample
total potential energy of the particles in the sample
average kinetic energy of the particles in the sample
average potential energy of the particles in the sample
25
Which line segment of the graph represents boiling?
DE
BC
CD
AB
26
Which element forms an ion that is smaller than its atom?
Carbon
Calcium
Radon
Chlorine
27
Properties of nonmetal atoms include
low ionization energy and low electronegativity
high ionization energy and low electronegativity
low ionization energy and high electronegativity
high ionization energy and high electronegativity
28
What does the diagram below represent?
alpha decay
fusion
beta decay
fission
29
Which element has an atom with the greatest tendency to attract electrons in a chemical bond?
chlorine
silicon
sulfur
carbon
30
What is the net charge on an ion that has 11 protons, 13 neutrons, and 10 electrons?
+1
-2
+2
-1
31
Which formula correctly represents antimony (V) oxide?
Sb2O5
Sb5O2
Sb5O
SbO5
32
Which compound contains only covalent bonds?
NaOH
CH3OH
Ba(OH)2
Ca(OH)2
33
The chemical formula for nickel (II) bromide is
N2Br
NiBr2
NBr2
Ni2Br
34
Which change of phase is exothermic?
H2O(l) → H2O(s)
H2O(s) → H2O(g)
CO2(s) → CO2(g)
NaCl(s) → NaCl(l)
35
What is the total charge of the nucleus of a sodium atom?
-11
+23
+11
0
36
Which two substances are covalent compounds?
KI(s) and NaCl(s)
C6 H12 O6 (s) and HCl(g)
C6 H12 O6 (s) and KI(s)
NaCl(s) and HCl(g)
37
A neutral atom contains 22 neutrons and 18 electrons. The number of protons in this atom is
1
18
22
40
38
In which sample of water do the molecules have the highest average kinetic energy?
80. mL at 40.°C
40. mL at 80.°C
60. mL at 60.°C
20. mL at 100.°C
39
Chlorine(g) is at 300 K + 1 atm. At which temp.+ pressure would Cl behave like an ideal gas?
0 K and 1.00 atm
273 K and 1.00 atm
600. K and 0.50 atm
150. K and 0.50 atm
40
Cobalt-60 is used in radiation therapy and undergoes beta decay.This nuclear reaction is called
nuclear fusion
artificial transmutation
natural transmutation
nuclear fission
41
Which nuclear emission has the greatest mass and the
least
penetrating power?
beta
gamma
alpha
positron
42
I-131 and I-128 are considered to be...
Ions
Isotopes
Exactly the same
Radioactive
43
The excited state for potassium is
2-8-1
2-8-7-2
2-8-8-1
2-7-2
44
How much heat energy must be absorbed to completely melt 35.0 grams of H
2
O(s) at 0°C?
79,100 J
146 J
9.54 J
11,700 J
45
Which segment represents an increase in potential energy + no change in average kinetic energy?
AB
BC
EF
CD
46
Given the reaction below, this reaction is best described as
fission
alpha decay
fusion
beta decay
47
Which sample contains particles in a rigid, fixed, geometric pattern?
KCl(s)
CO2(aq)
H2O(l)
HCl(g)
48
H
f
experimentally was 88 cal/g. The accepted value is 80. cal/g. What is the percent error?
90.%
11%
10.%
8.0%
49
Which letter represents the heat of fusion in the diagram below?
A
D
C
B
50
The correct formula for aluminum sulfate is
Al2(SO4)3
Al2S3
Al3S2
Al3(SO4)2
51
A gas changes directly to a solid during
sublimation
fusion
deposition
fission
52
Based on Table
N
, what fraction of a radioactive
90
Sr would remain unchanged after 56.2 years?
1/16
1/8
1/2
1/4
53
Under which conditions does a real gas behave most like an ideal gas?
at low temperatures and high pressures
at low temperatures and low pressures
at high temperatures and low pressures
at high temperatures and high pressures
54
What is the electron configuration of Magnesium in the ground state?
2-8-12-3
2-8-13-2
2-7-3
2-8-2
55
Which statement describes the particles of an ideal gas based on the kinetic molecular theory?
The gas particles are in constant, nonlinear motion
The gas particles are far apart and have negligible volume
Gas particles have collisions without transferring energy
The gas particles have attractive forces between them.
56
Aqueous solutions of compounds containing element
X
are blue. Element
X
could be
Calcium
Cobalt
Carbon
Chlorine
57
n atom contains 5 e-'s, 5 p+'s, and 5 n
0
's. How many dots should be in the Lewis dot structure?
5
10
8
3
58
What is the equivalent of 0 Kelvin on the Celsius scale?
-1000
2730
1000
-2730
59
Which mass measurement contains four significant figures?
3870 g
0.431 g
1003 g
0.086 g
60
Covalent bonds are formed when electrons are
captured by the nucleus
mobile within a metal
transferred from one atom to another
shared between two atoms
