wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Chemistry Unit 2 Test Review

Total questions: 40

Worksheet time: 1hrs 20mins

Name
Class
Date
1.
What particle completes this reaction?
a)
alpha particle
b)
beta particle
c)
gamma particle
d)
neutron
2.

Solve this equation for the missing element.

a)

Ag-115

b)

Cd-115

c)

Pd-115

d)

Not Listed

3.
If Gadolinium-150 goes through alpha decay, the resulting element has a new atomic mass of _____.
a)
150
b)
148
c)
146
4.

In the symbol 20682Pb what does 206 stand for?

a)

Number of Neutrons

b)

Atomic number

c)

Atomic mass

d)

Number of protons

5.
What is the symbol for an alpha particle?
a)
42He
b)
0-1e
c)
0+1 e
d)
10n
6.

Solve for the missing daughter atom in the following equation:

146C --> 0-1e + ________

a)

145B

b)

146C

c)

147N

d)

42He

7.

Solve this equation for alpha decay.

88226Ra --> ___ + 24He

a)

86222Rn

b)

89226Ac

c)

84224Po

d)

88225Ra

8.

Solve this equation for beta decay.

510 B--> ___ + -10e

a)

410Be

b)

610C

c)

710N

d)

613C

9.

Solve this equation for positron decay.

510 B--> ___ + +10e

a)

410Be

b)

610C

c)

710N

d)

613C

10.

When large atoms are split to release mass amounts of energy the process is called....?

a)
mass energy
b)
magneticism
c)
fusion
d)
fission
11.

The process by which small atoms are combined causing the mass release of energy is called ____.  

a)
a chain reaction 
b)
fission
c)
a chemical reaction 
d)
fusion 
12.

Has the symbol

a)

Alpha

b)

Beta

c)

Gamma

d)

Positron

13.
In what part of an atom can protons be found? 
a)
Inside the electrons
b)
Inside the neutrons 
c)
Inside the atomic nucleus 
d)
 Inside the electron shells
14.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
Beta
c)
Gamma 
d)
none
15.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
16.

Which of the following is best defined as a substance that CANNOT dissolve in water?

a)

water-soluble

b)

water-insoluble

c)

water-saturate

d)

water-dilute

17.

Table salt (NaCl) is an example of a

a)

atom

b)

element

c)

mixture

d)

compound

18.

____________: type of mixture that always looks cloudy because the suspended particles don’t settle to the bottom over time.

a)

solution

b)

colloid

c)

suspension

d)

saturated

19.

C3H5(NO3)3 Identify the correct number of atoms

a)

C = 3, H = 5, N = 3, O = 9

b)

C = 3, H = 5, N = 1, O = 9

c)

C = 9, H = 15, N = 3, O = 9

d)

C = 9, H = 15, N = 1, O = 3

20.

Calculate the molar mass of CuBr2

a)

143.45 g/mol

b)

223.35 g/mol

c)

287.30 g/mol

d)

307.90 g/mol

21.

What is the percent by mass of Cu in CuBr2?

a)

50%

b)

71.6%

c)

28.4%

d)

44.3%

22.

Match the following element with the correct family.

a)

Sodium

1.

Metal

b)

Germanium

2.

Metalloid

c)

Sulfur

3.

Nonmetal

23.

Which of the compounds below is/are ionic?

Categorize the following
MgO

CaCl2

KBr

BaCl2

Al2O3

CO2

NH3

CH4

SO2

PCl3

Ionic Compound
Covalent Compound
24.
If 10 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)

3.33 mg

c)

10 mg

d)

16.38 mg

25.
Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?
a)

7.625g

b)
2.5g
c)

20 g

d)

0.3125 g

26.

If the half-life of uranium-232 is 70 years, how many years will it take for 10 g of it to be reduced to 1.25 g?

a)

23.3 years

b)

700 years

c)

210 years

d)

3 years

27.

If an atom of Americium-231 (Am) goes through alpha decay, what Daughter element would you have at the end?

a)

Neptunium-227

b)

Neptunium-234

c)

Plutonium-231

d)

Curium-247

28.

The bottom number in alpha decay tells you the _____________ of the element.

a)

identity

b)

mass

c)

mass number

d)

symbol

29.

Which of the following scientists is credited with discovering the existence of the electron?

a)

Bohr

b)

Rutherford

c)

Thomson

d)

Millikan

e)

Chadwick

30.

Which of the following scientists is credited with discovering the existence of the nucleus?

a)

Bohr

b)

Rutherford

c)

Thomson

d)

Millikan

e)

Chadwick

31.

The half life of iodine-131 is 8.04 days. What mass of an iodine-131 must we have started with if we only have 2.5 g after 40.20 days?

a)

0.31 g

b)

100.5 g

c)

0.078 g

d)

80.0 g

32.

How many NEUTRONS are in a Gold atom?

a)

79

b)

196

c)

118

d)

275

33.

If 20 mg of Copper-65 is given to a patient, how much is left after 24 days? The half-life of Copper-65 is 8 days.

a)

1.25mg

b)

5.0 mg

c)

2.5 mg

d)

3.0 mg

34.

Using the nuclear symbol provided, how many electrons will this ion have?

a)

18

b)

16

c)

14

d)

30

35.

What particle is missing from the nuclear decay reaction?

a)
b)
c)
d)
36.

What particle is missing from the nuclear decay reaction?

a)
b)
c)
d)
37.

What is the correct daughter atom for the nuclear decay reaction?

a)
b)
c)
d)
38.

Which of the following are examples of radiation?

a)

Infrared waves or heat released from a campfire

b)

Radio Waves transmitting WiFi to your computer

c)

X-rays taking a picture of your bones

d)

Visible light that you can see with your eyes

39.

Which of the subatomic particles makes up the MASS of the atom?

a)

Protons and Electrons

b)

Neutrons only

c)

Electrons only

d)

Protons and Neutrons

e)

Protons, Electrons, and Neutrons

40.

Which of the following are Atom 1 and Atom 2 Isotopes of one another? Use the PEN numbers to determine.

a)
b)
c)
d)

Similar Resources on Wayground

ETS-Química 1

41 questions

ETS-Química 1

quiz

Worksheet

•

11th Grade

สอบปลายภาค1/2564 วิชาวิทยาศาสตร์กายภาพ

45 questions

สอบปลายภาค1/2564 วิชาวิทยาศาสตร์กายภาพ

quiz

Worksheet

•

10th Grade

Spring Semester Part I

40 questions

Spring Semester Part I

quiz

Worksheet

•

9th - 12th Grade

Bảng tuần hoàn các nguyên tố hóa học

43 questions

Bảng tuần hoàn các nguyên tố hóa học

quiz

Worksheet

•

10th - 12th Grade

Práctica de recuperación. TERMODINÁMICA Y REACCIONES QUÍMICAS

40 questions

Práctica de recuperación. TERMODINÁMICA Y REACCIONES QUÍMICAS

quiz

Worksheet

•

11th Grade

C9 The Periodic Table

42 questions

C9 The Periodic Table

quiz

Worksheet

•

9th - 12th Grade

End of Term Quiz

37 questions

End of Term Quiz

quiz

Worksheet

•

10th Grade

Símbolos químicos, valencias, prefijos y sufijos.

36 questions

Símbolos químicos, valencias, prefijos y sufijos.

quiz

Worksheet

•

10th - 12th Grade