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CHAPTER 8: RADIOACTIVITY

Total questions: 50

Worksheet time: 8hrs 20mins

Name
Class
Date
1.

which form of radiation is stopped by aluminium but not paper?

a)

Alpha

b)

Beta

c)

Gamma

2.

Which form of radiation is not deflected in an electric or magnetic field?

a)

Alpha

b)

Beta

c)

Gamma

3.

Radioactivity is spontaneous and random.

a)

True

b)

False

4.

What form of radioactive decay that reduces the atomic number or number of protons by 2?

a)

Alpha

b)

Beta

c)

Gamma

d)

None of the answers listed

5.

What do we call the tiny core at the center of an atom?

a)

Electron

b)

Neutron

c)

Proton

d)

Nucleus

6.

how much time has passed after 3 half lives?

a)

29 years

b)

87 years

c)

58 years

d)

116 years

7.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
8.

What type of decay is shown here

23892U ---> 23490Th + 42He.

a)

alpha

b)

beta

c)

gamma

9.
After 4 half-lives, 1g of a sample of Krypton-85 remains unchanged.  What was the original mass of the sample?
a)
16g
b)
32g
c)
0.0625g
d)
4g
10.

In the symbol 20682Pb what does 206 stand for?

a)

Mass number

b)

Atomic number

c)

Neutron number

d)

Number of protons

11.
What is the symbol for an alpha particle?
a)
42He
b)
0-1e
c)
0+1 e
d)
10n
12.

A sample of Radium-228 decays from 100g to 12.5g. How many half lives did it experience?

a)

1

b)

2

c)

3

d)

4

13.

If the half life of Uranium-240 was 10 years, how long would it take for it to decay from 310g to 80g?

a)

10 years

b)

240 years

c)

20 years

d)

30 years

14.

An isotope of an element has the same number of _________, but a different number of _________.

a)

Protons, electrons

b)

Protons, neutrons

c)

Electrons, neutrons

d)

Neutrons, protons

15.

Which type of radiation releases an electron?

a)

Alpha radiation

b)

Beta radiation

c)

Gamma radiation

d)

Theta radiation

16.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

17.

Which of the following is true about M?

a)

It is neutral

b)

Has high penetrating power

c)

Has high ionisation power

d)

Used to control thickness of metal

18.

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

a)

alpha particle

b)

beta particle

c)

gamma ray

19.

A random and spontaneous decay process of an unstable nucleus by emitting radioactive radiation is called..

a)

Radioactivity

b)

Radioactive decay

20.

There are ...types of radioactive radiation

a)

1

b)

2

c)

3

21.

Alpha radiation will emit

a)

Helium

b)

Electron

c)

Electromagnetic wave

22.

Beta radiation will emit

a)

Helium

b)

Electron

c)

Electromagnetic wave

23.

Gamma radiation will emit...

a)

Helium

b)

Electron

c)

Gamma ray

24.

Radioactive decay happen randomly and spontaneous.

a)

True

b)

False

25.

Diagram shows....radiation

a)

Alpha

b)

Beta

c)

Gamma

26.

This is......radiation

a)

Gamma

b)

Beta

c)

Alpha

27.

Diagram shows ....radiation

a)

Alpha

b)

Beta

c)

Gamma

28.

The first person who discovered x-ray is...

a)

Marrie Curie

b)

Wilhelm Conrad

c)

Henri Becquerel

29.

First person who discovered radioactive radiation is

a)

Wilhelm Conrad

b)

Hendri Becquerel

c)

Marrie Currie

30.

First person who discovered gamma rays emitted by radium is...

a)

Marrie Currie

b)

Wilhelm Conrad

c)

Hendri Becquerel

31.

What property was discovered by Curie & Becquerel that led to more accurate atomic theories?

a)

Ionization energy

b)

Atomic Radii

c)

Orbital structure

d)

Radioactivity

32.

Which chemical elements did Marie & Pierre Curie discover?

a)

Polonium

b)

Radiation

c)

Radium

d)

Zinc

33.

Which Nobel Prize were Marie and Pierre awarded jointly with Henri Becquerel in 1903?

a)

The Nobel Peace Prize

b)

The Nobel Prize for Physics

c)

The Nobel Prize for chemsitry

34.

Marie Curie died of pernicious anaemia in 1967, a condition related to ___ .

a)

Exposure to toxic smoke

b)

Exposure to radiation

c)

Exposure to UV light

35.

What did Wilhelm Roentgen create?

a)

tooth brush

b)

CT scan

c)

x-ray

d)

light bulb

36.

What year was it when Wilhelm was awarded the first physics Nobel Prize?

a)

1900

b)

1908

c)

1901

d)

2016

37.

What compounds did Henri Becquerel work with to discover radiation?

a)

Cobalt

b)

Gold

c)

Uranium

d)

Radium

38.

The table shows the half-lives of four types of isotope fluids emitting gamma rays. Which isotope of liquid is suitable for blood clotting detection?

a)

P

b)

Q

c)

R

d)

S

39.

Three types of radioactive radiation, P, Q and R, are directed to sheets of paper, aluminum sheets and lead sheets. Which of the following rays is represented by P, Q and R?

a)

P : Alpha

Q : Gamma

R : Beta

b)

P : Beta

Q : Alpha

R : Gamma

c)

P : Gamma

Q : Alpha

R : Beta

d)

P : Gamma

Q : Beta

R : Alpha

40.

Which of the following statements is a characteristic of beta rays?

a)

Positively charged particles

b)

It is an electromagnetic wave

c)

Has higher ionization power than alpha

d)

Has lower penetrating power than gamma.

41.

Which radioactive material can be used to determine the age of a fossil?

a)

Iodin - 131

b)

Carbon - 14

c)

Radium - 226

d)

Uranium - 235

42.

The diagram shows the deflection of two types of radioactive radiation in an electric field. What are the types of rays P and Q?

a)

P = alpha particles

Q = gamma rays

b)

P = beta particles

Q = gamma rays

c)

P = gamma radiation

Q = alpha particles

d)

P = gamma radiation

Q = beta particles

43.

An alpha particle is made up of

a)

2 protons and 4 neutrons

b)

1 proton and 1 neutron

c)

2 protons and 2 neutrons

d)

4 protons and 2 neutrons

44.

Which type of nuclear radiation can be stopped 60 cm of aluminum or 7 cm of lead?

a)

Alpha

b)

Beta

c)

Gamma

45.

Why is lead suitable for use as a radioactive waste container?

a)

Readily available

b)

High melting point

c)

Can withstand radioactive radiation

d)

Has a long half-life

46.

Radioactive dating uses the half-life of different radioactive materials to provide information about the _______ of a sample.

a)

purity

b)

age

c)

radioactivity

d)

nuclear stability

47.

Where does radioactivity have application in our lives?

a)

Medical

b)

Food Preservation

c)

Agriculture

d)

All of the above

48.

What is this symbol name?

a)

Radiactive logo

b)

Radura logo

c)

Mandura logo

d)

Zatura Logo

49.

Radioactive sources or radioactive waste storing can be done in containers with thick ____________ walls.

a)

Paper

b)

Aluminium

c)

Lead

d)

Glass

50.

Robotic hands are used to

handle radioactive substances

safely.

a)

True

b)

False

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