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H. Chem Quiz 2 Review

Total questions: 20

Worksheet time: 49mins

Name
Class
Date
1.

Which subatomic particles make up the mass of an atom?

a)

protons only

b)

protons and neutrons

c)

protons, neutrons and electrons

d)

protons and electrons

2.

How many neutrons are there for an atom with a mass of 20 amu and 11 protons?

a)

9

b)

11

c)

20

d)

31

3.

Which element has an atomic mass of 40 amu and 21 neutrons?

a)

potassium

b)

calcium

c)

scandium

d)

zirconium

4.
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
5.
An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?
a)
9.012, Beryllium
b)
12.011, Carbon
c)
6.941, Lithium
d)
10.812, Boron
6.
How many significant figures: 153.0 mL
a)
1
b)
2
c)
3
d)
4
7.
How many significant figures: 0.012 km
a)
1
b)
2
c)
3
d)
4
8.

Give the answer to the correct number of significant figures to

247.89 ÷ 43.5

a)

5.70

b)

5.7

c)

5.699

d)

5.69

9.

What electron configuration matches an oxygen atom?

a)

1s22s22p63s2, 3p64s23d104p5

b)

1s22s22p4

c)

1s22s22p6

d)

1s22s22p63s23p64s23d1

10.

Identify the Electron Configuration for Aluminum (Al)

a)

1s2 2s2 2p6 3s2 3p1

b)

1s2 2s2 2p6 3s2 3p3

c)

1s2 2s2 2p6 3s2 4p1

11.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
12.

How many electrons can the d subshell hold?

a)
8
b)
10
c)
2
d)
4
13.

How many electrons can the p sublevel hold?

a)
8
b)

6

c)
2
d)
4
14.

Valence electrons are the electrons in the

a)

Innermost energy level

b)

Middle energy level

c)

Highest energy level

d)

d subshell

15.

USE THE PERIODIC TABLE

How many valence electrons does sodium have?

a)

1

b)

2

c)

3

d)

4

16.

USE THE PERIODIC TABLE

How many valence electrons does Phosphorus have?

a)

31

b)

5

c)

15

d)

4

17.

What is the shorthand electron configuration for a Sulfur atom?

a)
[Ar] 3p4
b)
[He] 3s23p4
c)
[Ne] 3s23p4
d)
[Na] 3s23p4
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)
In the there should only be 1 orbital in the first 2p box and one in the 2nd 2p box
d)
All the arrows should be pointing up.
19.
What atom matches this electron configuration?
[Xe] 6s2 4f14 5d9
a)
Mercury
b)
Gold
c)
Platinum
d)
Thallium
20.

Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Based on the average atomic mass of Nitrogen, which isotope is the most abundant?

a)
Nitrogen-13
b)
Nitrogen-14
c)
Nitrogen-15
d)
Based on the information given, it cannot be determined

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