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Unit 1 Exam Review

Total questions: 34

Worksheet time: 32mins

Name
Class
Date
1.

The total number of protons and neutrons in the nucleus is also known as _______

a)

atomic number

b)

mass number

c)

average atomic mass

d)

neutrons

2.

Which is also the same as the number of protons?

a)

Atomic number

b)

Mass number

c)

Average Atomic Mass

d)

Neutrons

3.

Subtracting atomic mass and the atomic number gives you _______

a)

Atomic Number

b)

Mass Number

c)

Average Atomic Mass

d)

Neutrons

4.

Comparing protons and electrons, _______have a greater mass.

a)

protons

b)

electrons

c)

neither

5.

Comparing charges of protons and electrons, ________ have a negative charge.

a)

protons

b)

electrons

c)

neither

6.

Isotopes are atoms of the same element that have different number of _____________. This causes them to have different _________.

a)

protons/ atomic numbers

b)

neutrons/mass

c)

electrons/charge

7.

A mass spectrometer sorts Isotopes by ________. The lighter isotopes are deflected the __________.

a)

atomic number/most

b)

mass/most

c)

mass/least

d)

atomic number/least

8.

Which one of these best represents an isotope with 4 protons, 2 electrons and 5 neutrons?

a)
b)
c)
d)
9.

Which symbols represent different isotopes of the same element?

a)

Ca-12 and C-12

b)

Al-12 and P-12

c)

He-2 and He-3

d)

Be-2 and B-2

10.

Which atom contains exactly 6 neutrons?

a)

C-12

b)

O-6

c)

Mg-24

d)

Na-12

11.

Calculate the mass of 2.1 moles of Boron.

a)

5.14 grams

b)

10.81 grams

c)

22.7 grams

d)

2.1 grams

12.

Calculate the moles of 75 grams of Silicon.

a)

2.66 moles

b)

2,106 moles

c)

5.35 moles

d)

75 moles

13.

Calculate the atoms in a 3.0 gram sample of Neon.

a)

2.0 X 1023 atoms

b)

1.8 X 1024 atoms

c)

8.94 x 10 22 atoms

d)

2.9 x 1022 atoms

14.

Using the average atomic mass, which element could this be?

a)

Germanium

b)

Tin

c)

Antimony

d)

Sulfur

15.

Which of these subatomic particles are located in the nucleus?

a)

Protons

b)

Neutrons

c)

Electrons

d)

Ions

16.

Which subatomic particle is NOT found in the nucleus?

a)

Protons

b)

Neutrons

c)

Electrons

d)

Ions

17.

Check all that apply to atoms

a)

Most of the mass is in the nucleus

b)

Most of the mass is in the electron cloud

c)

Neutrons are in the electron cloud

d)

Electron cloud has almost no mass

18.

Calculate the amount of electrons in Ca2+.

a)

18

b)

20

c)

22

d)

2

19.

Calculate the amount of electrons in Cl1-.

a)

16

b)

17

c)

18

d)

1

20.

This is a neutral atom of _______

a)

Chlorine

b)

Oxygen

c)

Lithium

d)

Carbon

21.

This is a neutral atom of _______

a)

Oxygen

b)

Nitrogen

c)

Neon

d)

Helium

22.

How many protons does Magnesium have?

a)

12

b)

24.30

c)

10

d)

2

23.

What is the atomic number of Gold?

a)

79

b)

196.97

c)

11

d)

1

24.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
25.
Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C6H12O6? 
a)
1 mole = 78.12 g
b)
1 mole = 22.4 L 
c)
1 mol = 6.02x 1023 particles 
d)
more than one
26.
How many moles are in 19.82 g Mg? 
a)
1.226mol Mg
b)
481.7mol Mg
c)
1.000mol Mg
d)
 0.8156 mol Mg
27.
How many atoms of carbon are in 6.00g of carbon?
a)
1.20x1024atoms C
b)
6.02x1023atoms C
c)
3.01x1023atoms C
d)
1.50x1023atoms C
28.

Which element does this mass spectrum most likely represent?

a)

neon

b)

scandium

c)

boron

d)

sodium

29.
What do the peaks on the mass spectrum represent?
a)
anions
b)
different isotopes
c)
atoms with differing numbers of electrons
d)
numbers of electrons
30.

How many isotopes are shown in this mass spectrum?

a)

1

b)

84

c)

86

d)

4

31.

How many isotopes of this element are shown in the mass spectrum?

a)

98

b)

7

c)

100

d)

95.9 g/mol

32.

What is the mass number of the most abundant isotope?

a)

10

b)

11

c)

30

d)

100

33.

Which is a reasonable estimate of average atomic mass for the sample?

a)

82.1 amu

b)

83.1 amu

c)

84.1 amu

d)

85.9 amu

34.
What do you expect the molar mass to be for this element?
a)
91.4 g/mol
b)
90.0 g/mol
c)
4 g/mol
d)
50. g/mol

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