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FARAH SET 5

Total questions: 83

Worksheet time: 42mins

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.

Identify the type of nuclear decay shown here

21483Bi → 0-1e + 21484Po

a)

alpha

b)

beta

c)

gamma

11.

In the symbol 20682Pb what does 206 stand for?

a)

Mass number

b)

Atomic number

c)

Neutron number

d)

Number of protons

12.
What is the symbol for an alpha particle?
a)
42He
b)
0-1e
c)
0+1 e
d)
10n
13.

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

14.

How much of a 250g sample would be left after 5 half lives?

a)

125g

b)

62.5g

c)

31.25g

d)

7.81g

15.

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

16.

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

17.

Which type of radiation releases an electron?

a)

Alpha radiation

b)

Beta radiation

c)

Gamma radiation

d)

Theta radiation

18.

The % of the parent isotope remaining after 3 Half Lives.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

19.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

20.

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

21.

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

22.

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

a)

3.0 g

b)

0.25 g

c)

0.3 g

23.

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

a)

Radioactivity

b)

Radioactive decay

24.

There are ...types of radioactive radiation

a)

1

b)

2

c)

3

25.

Alpha radiation will emit

a)

Helium

b)

Electron

c)

Electromagnetic wave

26.

Beta radiation will emit

a)

Helium

b)

Electron

c)

Electromagnetic wave

27.

Gamma radiation will emit...

a)

Helium

b)

Electron

c)

Gamma ray

28.

Radioactive decay happen randomly and spontaneous.

a)

True

b)

False

29.

Diagram shows....radiation

a)

Alpha

b)

Beta

c)

Gamma

30.

This is......radiation

a)

Gamma

b)

Beta

c)

Alpha

31.

Diagram shows ....radiation

a)

Alpha

b)

Beta

c)

Gamma

32.

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

a)

Marrie Curie

b)

Wilhelm Conrad

c)

Henri Becquerel

33.

First person who discovered radioactive radiation is

a)

Wilhelm Conrad

b)

Hendri Becquerel

c)

Marrie Currie

34.

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

a)

Marrie Currie

b)

Wilhelm Conrad

c)

Hendri Becquerel

35.

Which of the following is an example of radioactive elements?

a)

Carbon-14

b)

Radon -222

c)

Thorium-234

d)

Iron-56

36.

Who is the German physicist who discovered x-ray.

a)

John Dalton

b)

Wilhelm Conrad Roentgen

c)

Antoine Henri Becquerel

d)

Marie and Pierre Curie

37.

He discovered radioactivity. He found uranium and unintentionally produced rays that can blacken a photographic plate even in the dark.

a)

Antoine Henri Becquerel

b)

Marie and Pierre Curie

c)

James Brooke

d)

J.J Thomsom

38.

Which radiations have ionising power. [More than 1 answer]

a)

Gamma ray

b)

X-ray

c)

Microwave

d)

Infrared

39.

Which elements are radioactive?

a)

Carbon-14

b)

Sodium-23

c)

Phosphorus-32

d)

Iodine-127

40.

What is the SI unit for radioactivity?

a)

becquerel (Bq)

b)

watt (W)

c)

curie (Ci)

d)

μSvh\frac{\mu Sv}{h}

41.

Which particles are positive ion?

a)

P

b)

Q

c)

R

d)

S

e)

T

42.

Which particles are negative ion?

a)

P

b)

Q

c)

R

d)

S

e)

T

43.

Which particles is neutral?

a)

P

b)

Q

c)

R

d)

S

e)

T

44.

What is the formula of ion X?

a)

Br-

b)

Br2+

c)

Br+

d)

Br2-

45.

Pa-234 decays to U-234 by emitting beta radiation. If the half-life of Pa-234 is 5.2 hours, what is the remaining mass of Pa-234 after 20.8 hours given its original mass is 32g.

a)

2g

b)

4g

c)

8g

d)

16g

46.

Why beta radiation deflects more compared to alpha radiation in electric field?

a)

Beta is high speed electrons.

b)

The mass of beta particles is more than alpha particles.

c)

The mass of beta particles is less than gamma rays.

d)

The mass of beta particles is less than alpha particles.

47.

What is the safe level of background radiation dose?

a)

Less than 0.2mSv/h

b)

Less than 0.2 mSv/s

c)

Less than 0.2 μSv per hour\mu Sv\ per\ hour

d)

Less than 0.2 μSv per \mu Sv\ per\ seconds

48.

what is the half-life of P?

a)

2 hours

b)

4 hours

c)

8 hours

d)

12 hours

49.

Which of the following changes an atom into an anion?

I Gains one or more electrons

II Loses one or more electrons

III Gains one or more protons

IV Loses one or more protons

a)

I and II

b)

III and IV

c)

II and III

d)

I and IV

50.

What is the product of decay Cobalt-60*

a)

Gamma ray

b)

Beta ray

c)

Alpha radiation

d)

X-ray

51.

What is the product of decay of thorium-234

a)

Beta ray

b)

Alpha radiation

c)

Gamma ray

d)

X-ray

52.

Which radioactive element is used in determine the age of fossil and artifacts?

a)

Phosphorus-32

b)

Sodium-24

c)

Carbon-14

d)

Cobalt-60

53.

Which radioactive radiation is used in the food preservation? This radiation kills bacteria in the food

a)

Alpha radiation

b)

Beta radiation

c)

Gamma ray

d)

Microwave

54.

Which radioactive elements is pair with the right function?

a)

Carbon-14: detect pipe leakage

b)

Sodium-24: determine the absorption rate of phosphate fertiliser in plants.

c)

Cobalt-60: treat cancer

d)

Iodine-131: estimate fossil age or artifacts

55.

The first person to discover radioactivity

a)

Marie Curie

b)

Antoine Henri Becquerel

c)

Wilhelm Conrad Roentgen

d)

Pierre Curie

56.

This process is known as

Proses ini dikenali sebagai

a)

nuclear fission

pembelahan nuklear

b)

radioactive decay

pereputan radioaktif

c)

nuclear fusion

pelakuran nuklear

d)

proses pengionan

ionising process

57.

What is the meaning of radioactivity?

Apakah maksud keradioaktifan?

a)

The radiation which produces positive or negative ions when crossing the air

Sinaran yang menghasilkan ion positif atau ion negatif apabila melintasi udara

b)

Process of transferring energy to a medium or space which occurs in the form of waves or particles

Proses pemindahan tenaga kepada medium atau ruang yang berlaku dalam gelombang atau zarah

c)

Process of a random and spontaneous decay of an unstable nucleus by emitting radioactive radiation

Proses pereputan rawak dan spontan bagi nukleus yang tidak stabil dengan memancarkan sinaran radioaktif

d)

The time taken for the number of undecayed nuclei to reduce to half of its original value.

Tempoh masa yang diambil untuk bilangan nukleus yang belum mereput untuk berkurang menjadi setengah daripada nilai asalnya.

58.

Radioactive substance Q has a half life of 9 minutes. What is the time taken for the atom to decay to 1 g if its initial mass is 8 g?

Bahan radioaktif mempunyai masa 9 minit. Apakah masa yang diambil untuk atomnya mereput menjadi 1 g jika jisim asalnya ialah 8g?

a)

9 minutes/minit

b)

18 minutes/minit

c)

27 minutes/minit

d)

36 minutes/minit

59.

The half life of protactinium-234 is 5.2 hours. If the initial mass of protactinium-234 is 80g. Calculate the mass of protactinium-234 after 15.6 hours.

Separuh hayat protaktinium-234 ialah 5.2 jam. Jika jisim asal protaktinium-234 ialah 80g, hitung jisim proktatinium-234 selepas 15.6 jam.

a)

40g

b)

20g

c)

10g

d)

5g

60.

Diagram shows the graph of activity against time of radioactive substance X.

Rajah menunjukkan graf keaktifan melawan masa bagi bahan radioaktif.


What is the half life of radioactive substance X?

Berapakah separuh hayat bagi bahan radiokatif?

a)

20s

b)

40s

c)

60s

d)

80s

61.

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

62.

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

63.

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.

64.

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

65.

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

66.

The half-life of a type of radioactive material is 3 days. How much time does it take for 10 g of this material to decay until the remaining balance is 1.25 g?

a)

3 days

b)

6 days

c)

9 days

d)

12 days

67.

Among the following figures, who first discovered radioactive rays?

a)

Wilhelm Conrad Rontgen

b)

Antoine Henri Becquerel

c)

Marie Sklodowska Curie

d)

Pierre Curie

68.

Salah seorang daripada pengkaji awal bahan radioaktif iaitu Marie Curie telah mati akibat kesan sampingan daripada kajian yang dilakukannya. Apakah penerangan yang tepat untuk sebab-sebab kematiannya?


One of the early researchers of radioactive materials, Marie Curie, died as a result of side effects from her studies. What is the exact explanation for the causes of his death?

a)

Telah termakan makanan yang tercemar dengan bahan radioaktif / Has ingested food contaminated with radioactive material

b)

Menderita penyakit kanser darah kesan pendedahannya secara langsung dengan bahan radioaktif/ Suffering from blood cancer as a result of direct exposure to radioactive substances

c)

Mati akibat letupan bahan radioaktif di dalam reaktor/ Died due to explosion of radioactive material in the reactor

d)

Mati terhidu asap yang dibebaskan oleh bahan radioaktif/ Died inhaling smoke released by radioactive material

69.

Why is the atom in the diagram above said to be neutral?

a)

Has the same number of neutrons and protons

b)

Has the same number of electrons and protons

c)

Has neutrons in the nucleus that are neutral in nature

d)

Has electrons located outside the nucleus

70.

Why are ultra violet rays harmful to humans?

a)

Causes skin cancer if exposed to excessive exposure

b)

Has the same number of electrons and protons

c)

Causes embryonic defects in the womb

d)

Causes damage to the retina of the eye

71.

Which of the following is not a precautionary measure to take when handling radioactive material?

a)

Employees need to undergo radioactive material handling training

b)

Workers need to wear a dosimeter which is a hat that protects them from radioactive rays

c)

High-level radioactive material needs to be handled by the robot arm

d)

Radioactive material should be stored in a thick lead or concrete container

72.

Which of the following forms a positive ion?

a)

Number of protons-10, Number of electrons -12

b)

Number of protons-15, Number of electrons-15

c)

Number of protons-23, Number of electrons -21

d)

Number of protons-19, Number of electrons -21

73.

Which ionizing radiation has the highest ionizing power?

a)

X-ray

b)

Gamma ray

c)

Beta-ray

d)

Alpha-ray

74.

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

75.

Which of the following is the correct match for radioactive material and its uses?

a)

Cobalt-60 - preserves food

b)

Carbon-14- destroys cancer cells

c)

Iodine-131 - treats the thyroid gland

d)

Phosphorus -32- Controls the thickness of metal sheets

76.

What radiation is emitted during the radioactive decay process?

a)

X-ray

b)

Beta ray

c)

Ultraviolet ray

d)

Infrared

77.

Which of the following is a source of man-made background radiation?

a)

Supernova explosion

b)

Uranium in the soil

c)

Nuclear weapons test

d)

Carbon-14 from cosmic rays

78.

What radioactive materials are used to estimate the age of ancient fossils?

a)

Cobalt -60

b)

Carbon -14

c)

Sodium -24

d)

Phosporus -32

79.

What does radioactive material mean?

a)

Elements that have a stable nucleus.

b)

Elements that have unstable nucleus

80.

Which subatomic particles have no charge?

a)

Proton

b)

Electron

c)

Neutron

81.

Select the following electromagnetic radiation that shows ionizing radiation.

a)

Gamma rays

b)

Infrared rays

c)

Beta rays

d)

Visible light

82.

Which beam will be diverted to the positive plate?

a)

Gamma rays

b)

Beta ray

c)

Alpha ray

d)

X-ray

83.

Which one of the followings have the highest electromagnetic waves?

a)

Gamma rays

b)

Alpha rays

c)

Beta rays

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