Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Unit 2 Preview

Total questions: 47

Worksheet time: 1hrs 28mins

Name
Class
Date
1.

_____is the joining of atomic nuclei

a)

Fusion

b)

chain reaction

c)

Photosynthesis

d)

Fission

2.
Where does fusion occur naturally?
a)
Underwater
b)
All around us
c)
In the radioactive waste
d)
On the sun
3.
Which of the following is true about nuclear fusion?
a)
It is easy to implement.
b)
It produces less energy than nuclear fission.
c)
It produces more energy than nuclear fission.
d)
It has the ability to occur easily in everyday life.
4.

Positive(+) Charges are called

a)

Protons

b)

Ions

c)

Electrons

d)

Neutrons

e)

Positrons

5.

The Nucleus has an overall ____ charge

a)

Neutral

b)

Negative

c)

Positive

d)

Depends on the Element

6.

Negative Charges are called

a)

Protons

b)

Electrons

c)

Neutrons

d)

Negativtrons

e)

Ions

7.

The number of ____ determines the element

a)

Protons

b)

Neutrons

c)

Electrons

d)

Protons & Neutrons

8.

Which Subatomic Particles Are Found in the Nucleus?

a)

Protons & Electrons

b)

Electrons & Neutrons

c)

Protons & Neutrons

d)

Protons Only

e)

Neutrons Only

9.

Electrons are located where in the aton?

a)

Electron Cloud (Outside the Nucleus)

b)

Inside the Nucleus

c)

Electrons are not part of the atom

10.

Elements with different number of neutrons are called

a)

Isotopes

b)

Ions

c)

Neutrotopes

d)

Neurons

11.

What is the atomic number of the element shown?

a)

8

b)

15.99

c)

7.99

d)

23.99

12.

How protons does this element have?

a)

8

b)

16

c)

4

d)

24

13.

What is the atomic mass of this element?

a)

35

b)

80

c)

115

d)

45

14.

How many neutrons are in this element?

a)

35

b)

80

c)

115

d)

45

15.

How many electrons are in this element if its electrically neutral?

a)

35

b)

45

c)

0

d)

80

16.

The heaviest part of the Atom is

a)

The Nucleus

b)

The Electron Cloud

c)

The mass is evenly distributed in the Atom

d)

Atoms have no mass

17.

Typically in an atom, which two subatomic particles are equal in number?

a)

protons and neutrons

b)

all subatomic particles are equal in number

c)

neutrons and electrons

d)

protons and electrons

18.
An atom that has gained or lost electrons is called ...
a)
a winner
b)
an isotope
c)
an ion
d)
a loser
19.

Find the molar mass of H2H_2  

a)

1.01g

b)

2.02g

c)

1.02g

d)

2.01g

20.

Find the molar mass of CaCO3CaCO_3   

a)

100.09g

b)

100g

c)

100.2g

d)

101g

21.

Find the molar mass of NH3NH_3   

a)

17.04g

b)

17g

c)

14.07g

d)

17.03g

22.

Find the number of moles in 45 grams of H2H_2  

a)

22.27mol

b)

22.28mol

c)

27.22mol

d)

28.22mol

23.

Find the number of moles in 100 grams of CaCO3CaCO_3   

a)

1mol

b)

0.99mol

c)

0.1mol

d)

99mol

24.

Find the number of grams of a substance containing 0.5mol of CaCO3CaCO_3   

a)

100.09g

b)

50g

c)

50.05g

d)

101g

25.

Find the number of grams of a substance containing 2mol of NaHCO3NaHCO_3   

a)

84g

b)

84.01g

c)

168g

d)

168.02g

26.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
27.
What is the mass number of this nucleus?
a)
1
b)
3
c)
4
d)
7
28.

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

a)

6

b)

10

c)

4

d)

8

29.

An atom of silicon has 14 protons and 15 neutrons. What is the mass number of this atom of silicon?

a)

14

b)

15

c)

29

d)

28.085

30.

A specific atom of molybdenum has an atomic number of 42 and a mass number of 96. How many protons are in this atom of molybdenum?

a)

21

b)

54

c)

42

d)

96

31.

The atomic mass of an element is the ___.

a)

average of the mass number and the atomic number for the element

b)

weighted average of the masses of the isotopes of the element

c)

total mass of the isotopes of the element

d)

total number of subatomic particles in the nucleus

32.

Chlorine has two naturally occurring isotopes, Cl-35 and Cl-37, The atomic mass of chlorine is 35.45. Which of these two isotopes of chlorine is more abundant?

a)

Cl-35

b)

Cl-37

c)

Cannot be determined from the information provided.

33.
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
34.

What is the molar mass of NaCl?

a)

58.45g/mol

b)

28g/mol

c)

12g/mol

d)

6.02 x 1023

35.

Calculate the % composition by mass of oxygen present in H2SO4.

a)

16.3%

b)

65.25%

c)

32.6%

d)

57.14%

36.
How many moles are 98.3 grams of aluminum hydroxide, Al(OH)3?
a)
1.26 moles
b)
0.8 moles
c)
7,673.4 moles
d)
150 moles
37.

What is the empirical formula for thr compound, CxHyOz , if the ratio C: H: O equal to 2: 2.5 : 1

a)

C2H2O1

b)

C2H5O1

c)

C4H5O2

d)

C3H2O2

38.

The empirical formula for hydrocarbon A is C2H7O. If the molar mass of the hydrocarbon is 141 g/mol, determine the molecular formula for this hydrocarbon.

a)

C2H7O

b)

C4H14O2

c)

C6H21O3

d)

C8H28O4

39.

Calculate the percentage of composition by mass of oxygen in Al(HCO3)3.

a)

22.86 %

b)

68.57 %

c)

78.26 %

d)

40.50 %

40.

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

a)

NaPO2

b)

Na2PO3

c)

Na3PO4

d)

NaPO4

41.

The mass of 4.50 x 1022 Cu atoms is ___________

a)

4.75 g

b)

63.55 amu

c)

7.47 x 10-2 g

d)

7.47 x 10-2 amu

42.

Identify the number of Chlorine atoms in 65.8 g CaCl2.

a)

7.14 x 1023 atoms

b)

8.71 x 1023 atoms

c)

1.22 x 1023 atoms

d)

3.57 x 1023 atoms

43.

What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?

a)

C3H8

b)

CH4

c)

C2H2

d)

C4H10

44.

What is Avogadro's number?

a)

6.02 x 1023

b)

1 mole

c)

600 million

d)

6.02

45.

How many moles are in 6.02 x 1023 molecules of H2O?

a)

1 mole

b)

2 moles

c)

6.02 moles

d)

602000000000000000000000 moles

46.

How many molecules are there in 31.8 moles of water?

a)

5.28 x 10-23 molecules

b)

1.91 x 1025 molecules

c)

5.28x 10-25 molecules

d)

1.91 x 1023 molecules

47.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6

Similar Resources on Wayground

Chemistry Regent Exam-June 2011

50 questions

Chemistry Regent Exam-June 2011

quiz

Worksheet

•

KG - University

Physical Science EOC Review

50 questions

Physical Science EOC Review

quiz

Worksheet

•

8th - 12th Grade

Unit #3; Chemical Reactions

50 questions

Unit #3; Chemical Reactions

quiz

Worksheet

•

7th - 10th Grade

Solutions, Acids, & Bases Review

50 questions

Solutions, Acids, & Bases Review

quiz

Worksheet

•

10th Grade

Laboratory Equipment

52 questions

Laboratory Equipment

quiz

Worksheet

•

10th - 12th Grade

Finals Practice Quiz

51 questions

Finals Practice Quiz

quiz

Worksheet

•

10th Grade

Chapter 6 Sections 4 and 5 Test Review

42 questions

Chapter 6 Sections 4 and 5 Test Review

quiz

Worksheet

•

10th Grade

Final review of Chemistry 20-21

45 questions

Final review of Chemistry 20-21

quiz

Worksheet

•

8th - 10th Grade