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Chemistry Test #5 Review

Total questions: 55

Worksheet time: 55mins

Name
Class
Date
1.

At a nuclear power plant, these are referred to as _________.

a)

cooling towers

b)

reactor towers

c)

smoke stacks

d)

vapor chambers

2.

Nuclear power plants need _____ to keep the reaction going by _____ _____ neutrons that hit the uranium.

a)

moderators; speed up

b)

moderators; slow down

c)

control rods; speed up

d)

control rods; slow down

3.

If 10.0 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

a)

1.25 mg

b)

1.25 g

c)

10 g

d)

10 mg

4.
If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?
a)
1 half-life
b)
2 half-lives
c)
3 half-lives
d)
4 half-lives
5.
What is the half-life of iodine-131?
a)
32 days
b)
8 days
c)
16 days
d)
24 days
6.
What is the most penetrating radiation?
a)
gamma
b)
alpha
c)
beta
d)
positron
7.

Lead-210 decays into ____ via ____ emissions.

a)

bismuth-214; alpha

b)

bismuth-214; beta

c)

bismuth-210; alpha

d)

bismuth-210; beta

8.

Nuclear power plants utilize ____ to produce heat energy.

a)

fusion

b)

fission

c)

alpha radiation

d)

burning coal

9.

In a nuclear power plant, the __________ absorb(s) excess neutrons, ______ the reaction.

a)

control rods; slowing down

b)

control rods; speeding up

c)

moderator; slowing down

d)

moderator; speeding up

10.

What is the cheapest substance that you could use to shield yourself from alpha radiation?

a)

lead

b)

aluminum

c)

copper

d)

paper

11.

What atom matches this electron configuration?

1s22s22p63s23p64s23d10

a)

zinc

b)

copper

c)

nickel

d)

germanium

12.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
13.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
14.
The electron configuration of an atom is 1s22s22p6.  The number of electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
15.

Which electron configuration belongs to Cl-?

a)

1s2 2s2 2p6 3s2 3p5

b)

1s2 2s2 2p6 3s2 3p6

c)

1s2 2s2 2p6 3s2 3p7

d)

1s2 2s2 2p6 3s2 3p4

16.
This orbital diagram represents:  
a)
C
b)
B
c)
N
d)
O
17.
This orbital diagram represents:  
a)
C
b)
B
c)
N
d)
O
18.

What is incorrect about this orbital diagram?

a)

Both arrows in the 2p box should be pointing up.

b)

There is nothing incorrect with this diagram.

c)

There should only be 1 arrow in the first 2p box and one in the 2nd 2p box.

d)

All the arrows should be pointing up.

19.
How many electrons can the d sublevel hold?
a)
14
b)
10
c)
2
d)
6
20.

Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?

a)

Hund’s rule

b)

aufbau principle

c)

Pauli Exclusion principle

d)

quantum rule

21.

What is the short-hand electron configuration for sulfur?

a)

[Ar] 3p4

b)

[He] 3s2 3p4

c)

[Ne] 3s2 3p4

d)

[Na] 3s2 3p4

22.

What is the short hand configuration for silicon?

a)

[Ar]2s22p2

b)

[Ne]2s22p2

c)

[Ne]3s23p2

d)

[Ne]3s23p4

23.

What is the short hand configuration for iodine?

a)

[Ar]4s23d6

b)

[Ne]4s23d6

c)

[Kr]5s24d105p5

d)

[Kr]4s24d104p5

24.

How many electrons does iron have in the 3rd energy level?

a)

2

b)

6

c)

8

d)

14

25.

This is the energy level diagram for which element?

a)

lithium

b)

carbon

c)

oxygen

d)

nitrogen

26.

A d orbital can hold a maximum of ____ electrons.

a)

2

b)

6

c)

10

d)

14

27.

How many electrons does O2- have?

a)

6

b)

8

c)

10

d)

16

28.

Each orientation of an orbital can hold ___ electrons maximum.

a)

1

b)

2

c)

3

d)

4

29.

In the equation, 146C --> 147N + 0-1e, the _______ decay of radioactive carbon-14 results in the creation of a new nitrogen-14 atom.

a)

gamma

b)

beta negative

c)

alpha

d)

beta positive

30.

How is the alpha particle written in a nuclear equation?

a)

42He

b)

24He

c)

0+1e

d)

0-1e

31.

Uranium-238 decays into thorium-234 by emitting

a)

an alpha particle.

b)

a beta particle.

c)

gamma rays.

d)

visible light.

32.
A helium nucleus with two protons and two neutrons is called a(n) ____.  
a)
alpha particle
b)
electroscope
c)
beta particle
d)
gamma ray
33.

Which type of nuclear radiation is being emitted here?

a)

Alpha

b)

beta negative

c)

gamma

d)

beta positive

34.
If we start off with element 24X50 after an alpha decay we get another element Y that looks like
a)
22Y50
b)
22Y46
c)
20Y48
d)
26Y54
35.

If we start off with element 5024X after an beta positive decay we get another element Y that looks like

a)

5023Y

b)

4622Y

c)

5025Y

d)

5024Y

36.

Solve this equation.

85209At --> ___ + 24He

a)

83205Bi

b)

86209Rn

c)

81207Tl

d)

85208At

37.
Balance the following equation:
146C --> 0-1e + ________
a)
145B
b)
146C
c)
147N
d)
42He
38.

Solve this equation.

614C --> ___ + -10e

a)

410Be

b)

714N

c)

210He

d)

613C

39.

Solve this equation.

614C --> ___ + +10e

a)

410Be

b)

714N

c)

210He

d)

514B

40.

Thorium-230 decays into _____ via _____ emissions.

a)

radium-88; alpha

b)

radium-226; beta

c)

polonium-218; alpha

d)

radium-226; alpha

41.

All of the following are arguments against nuclear power except ---

a)

storage of radioactive waste

b)

produce greenhouse gases

c)

cause acid rain

d)

natural disasters (tsunamis, earthquakes, etc.)

42.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
43.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
44.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
45.
A neutral atom of Carbon-13 has ________ electrons and _________ neutrons
a)
13, 13
b)
6, 7
c)
7, 7
d)
6, 6
46.
4.35% of all X atoms have a mass of 39.946 amu. 83.79% have a mass of 41.941 amu, 9.50% have a mass of 42.941 amu, and 2.36% have a mass of 43.939 amu. What is the average atomic mass of atom X?
a)
41.97 amu
b)
42.19 amu
c)
10.43 amu
d)
40.04 amu
47.
Arrange in order of increasing ability to penetrate matter.
a)
Beta, gamma, alpha
b)
Alpha, gamma, beta
c)
Gamma, beta, alpha
d)
Alpha, beta, gamma
48.

In the symbol 167N what the 7 stand for?

a)

Mass number

b)

Atomic number

c)

Atomic mass

d)

Number of neutrons

49.
In the symbol 20682Pb what does 206 stand for?
a)
Mass number
b)
Atomic number
c)
Atomic mass
d)
Number of protons
50.

All of the following are arguments in favor of nuclear power except ---

a)

Once the plant is built, it's an inexpensive source of power.

b)

It has a high safety record, with only two major meltdowns in the span of about 65 years.

c)

It consistently produces large amounts of energy.

d)

The waste is easy to dispose.

51.

Which two elements on the periodic table are in the same group?

a)

Na and He

b)

O and C

c)

Li and Ne

d)

He and Ar

52.
Alkali metals are found in which group of the periodic table?
a)
Group 1
b)
Group 2
c)
Group 7
d)
group 8 
53.

Group 17 of the periodic table is called the

a)

halogens.

b)

noble gases.

c)

alkaline earth metals.

d)

lanthanide series.

54.

Iron is in the ___ block?

a)

s

b)

p

c)

d

d)

f

55.

All of the alkaline earth metals are in

a)

group 1.

b)

group 2.

c)

period 1.

d)

period 2.

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