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Radioisotopes

Total questions: 50

Worksheet time: 48mins

Name
Class
Date
1.
Any atom containing an unstable nucleus is called
a)
radioisotope
b)
unisotope
c)
particles
d)
nuclei
2.
What would two different isotopes of an atom have in common?
a)
Number of neutrons 
b)
Number of protons
c)
Atomic weight 
d)
Atomic mass
3.
An isotope of an element has the same number of _________, but a different number of _________.
a)
Protons, electrons
b)
Protons, neutrons
c)
Electrons, neutrons
4.
What makes something radioactive?
a)
elements with an atomic number above 81
b)
an unstable nucleus
c)
contaminated sewage
d)
It decays over time
5.

Which of the following types of radiation is an electron ejected from a nucleus?

a)

Alpha

b)

Beta

c)

Gamma

d)

Neutron

6.

Which type of radiation is represented by this symbol?

a)

Alpha

b)

Beta

c)

Gamma

d)

Neutron

7.

Which type of radiation is represented by this symbol?

a)

Alpha

b)

Beta -

c)

Gamma

d)

Beta +

8.

How many neutrons does an alpha particle have?

a)

1

b)

2

c)

3

d)

4

9.

How many protons does an alpha particle have?

a)

1

b)

2

c)

3

d)

4

10.

What is the mass number for an alpha particle?

a)

1

b)

2

c)

3

d)

4

11.

What is the atomic number for an alpha particle?

a)

1

b)

2

c)

3

d)

4

12.

Another way to indicate an alpha particle is

a)
b)
c)
d)
13.

What element can accumulate on Earth due to nuclear reactions (uranium and Thorium) that emit alpha particles?

a)

Hydrogen

b)

Helium

c)

Uranium

d)

Carbon

14.

Has a mass less than 1/1000 atomic mass units and a charge of -1

a)
Alpha
b)

Beta -

c)
Gamma
d)

Beta +

15.

Has a mass of less than 1/1000 and a positive charge (+1)

a)
Alpha
b)

Beta -

c)
Gamma
d)

Beta +

16.

The three types of nuclear radiation are _______ radiation, _________radiation, and _____________ radiation.

a)

alpha, beta, and gamma

b)

theta, beta, and kappa

c)

alpha, beta, positron

17.

particle of charge +1 and mass equal to that of an electron

a)

positron

b)

radioactivity

c)

alpha particle

d)

gamma radiation

e)

beta particle

18.

What is the name of this isotope?

a)

Iodine-131

b)

Iodine-53

c)

Iodine-184

d)

Iodine-78

19.
Where does radioactivity have application in our lives?
a)
Medicine
b)
Energy (electricity)
c)

War

d)
All of the above
20.

Which of the following particles have the fastest speeds released as radiation? Choose TWO.

a)

Helium

b)

positrons

c)

electrons

d)

Hydrogen

e)

protons

21.

Which particle is the largest and slowest when released from a large unstable atom?

a)

He

b)

positron

c)

electron

d)

proton

e)

neutron

22.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

23.

Potassium-39 has how many neutrons?

a)

19

b)

18

c)

20

d)

21

24.

Nickel-59 has how many neutrons?

a)

30

b)

31

c)

32

d)

33

25.

76 protons and 114 neutrons

a)

Osmium-114

b)

Osmium-76

c)

Osmium-190

d)

Osmium-190.23

26.

12 protons and 13 neutrons

a)

Mg-12

b)

Mg-13

c)

Mg-25

d)

Mg-24.305

27.

9 protons and 9 neutrons

a)

Fluorine-18

b)

Fluorine-9

c)

Fluorine-16

d)

Fluorine-18.998

28.

Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium?

a)

85.468 amu

b)

37 amu

c)

85.6 amu

d)

86.4 amu

29.

There are two primary isotopes found in any sample of copper: copper-63 and copper-65. The isotope 65Cu composes 69.2% of the sample and 63Cu comprises the other 30.8%. Based on this data, what is the atomic mass of copper?

a)

29 amu

b)

63.546 amu

c)

64.4 amu

d)

63.6 amu

30.

How do you calculate mass number?

a)

Mass x percent

b)

Protons + Electrons

c)

Protons + Neutrons

d)

Neutrons + Protons + Electrons

31.

Using the picture, you can determine that Carbon-13 has ____ neutrons.

a)

13

b)

6

c)

12

d)

7

32.

Isotopes are atoms of the same element with different ____________.

a)

Number of Neutrons & Mass Number

b)

Number of Protons & Atomic Number

c)

Number of Protons, Neutrons, and Electrons

d)

Number of Electrons & Mass Number

33.

Organize these options into the right categories

Categorize the following

carbon-14

lithium-7

phosphorus-30

Hyphen Notation
Isotope Notation
34.

Match the following

a)

the mass of the atom is found here

1.

nucleus

b)

these are in the nucleus

2.

protons & neutrons

c)

if you change the number of protons you get a different...

3.

element

d)

if you change the number of neutrons you get a different...

4.

mass

e)

an isotope has the same number of protons but a different number of...

5.

neutrons

35.

Label the picture

a)

mass number

b)

atomic number

c)7
d)15
e)charge
1
2
3
1)
2)
3)
36.

Label the isotope symbol for Calcium-41.

a)

19

b)

41

c)

22

d)

20

e)

40

f)

21

g)

39

1
2
3
1)
2)
3)
37.

Click on the mass number:

A
B
C
38.

Click on the atomic number:

A
B
C
39.

Click on the mass number (protons + neutrons):

A
B
C
40.

Write the hyphen notation for the element that has 9 protons and 10 neutrons:

(a)  

41.

What is the number of protons in neon - 22?

a)

10

b)

12

c)

22

d)

32

42.

Element X has 13 neutrons with a mass number of 28. Element Y has 13 protons. These elements are:

a)

Different elements

b)

Isotopes

43.

Element X has 13 neutrons with a mass number of 26. Element Y has 13 protons. These elements are:

a)

Different elements

b)

Isotopes

44.

An unknown element has two naturally occurring isotopes. One has a mass of 10.01 amu and % abundance of 19.8%. The other has a mass of 10.99 amu and % abundance of 80.2%. Calculate the atomic mass.

a)

1079.6

b)

107.95 amu

c)

21 amu

d)

10.8 amu

45.

What is the number of protons in phosphorus-31?

a)

15

b)

16

c)

31

d)

46

46.

How many neutrons are in the isotope pictured above?

a)

29

b)

34

c)

63

d)

92

47.

How many protons are in the isotope pictured above?

a)

29

b)

34

c)

63

d)

92

48.

In Beta decay what particle is emitted?

a)

Helium (He)

b)

Electron (e-)

c)

Energy (Photon)

49.

This type of radiation can alter DNA and result in cancerous cells.

a)

alpha

b)

beta

c)

gamma

d)

all of the above

e)

none of the above

50.

This particle is most dangerous when swallowed or breathed in.

a)

alpha

b)

beta

c)

gamma

d)

none of the above

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