Radioactivity MCQs with Answers

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Radioactivity Online Quiz

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• Test Name: Radioactivity MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Radioactivity

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1 / 40

Which of the following is the most penetrating type of radiation?

Beta particles

Alpha particles

Gamma rays

2 / 40

What is the main purpose of a scintillation counter?

Detect radiation

Control temperature

Measure humidity

3 / 40

Which radioactive element was famously used by Marie Curie in her research?

Plutonium

Thorium

Radium

4 / 40

Who discovered radioactivity?

Ernest Rutherford

Marie Curie

Henri Becquerel

5 / 40

What is the term for the spontaneous emission of radiation by an unstable atomic nucleus?

Radioactive absorption

Radioactive synthesis

Radioactive decay

6 / 40

What material can effectively block beta particles?

Lead sheet

Paper

Aluminum foil

7 / 40

What is the main danger of gamma radiation?

Penetrates deeply into tissues

Produces sound waves

Causes burns on the skin

8 / 40

Which type of radiation is the least ionizing?

Alpha particles

Gamma rays

Beta particles

9 / 40

What is the primary use of iodine-131 in medicine?

Measure blood pressure

Treat thyroid disorders

Diagnose bone fractures

10 / 40

Which of the following isotopes is used in radiocarbon dating?

Carbon-13

Carbon-14

Carbon-12

11 / 40

Which type of radiation results in the conversion of a neutron into a proton?

Beta decay

Alpha decay

Gamma decay

12 / 40

What is the term for the time it takes for half of the radioactive atoms in a sample to decay?

Half-life

Full-life

Quarter-life

13 / 40

What is the main health risk associated with long-term exposure to radon gas?

Bone fractures

Skin burns

Lung cancer

14 / 40

What is radon-222 primarily known for?

Being a stable isotope

Being a heavy metal

Being a radioactive gas

15 / 40

What particle is emitted in beta decay?

Electron

Proton

Neutron

16 / 40

Which element is known for its use in smoke detectors due to its radioactive properties?

Americium

Uranium

Thorium

17 / 40

What type of radiation is a form of electromagnetic radiation?

Gamma rays

Alpha particles

Beta particles

18 / 40

Which radiation is used to sterilize medical equipment?

Gamma rays

Beta particles

Alpha particles

19 / 40

What device measures the amount of radiation absorbed by a material?

Dosimeter

Voltmeter

Ammeter

20 / 40

Which type of radiation can be stopped by a sheet of paper?

Alpha particles

Gamma rays

Beta particles

21 / 40

What is a common unit to measure radioactivity?

Newton

Becquerel

Joule

22 / 40

What is the process of a nucleus losing energy by emitting radiation called?

Fission

Decay

Fusion

23 / 40

What is the name of the process where a neutron is absorbed and a proton is emitted?

Electron capture

Neutron capture

Proton capture

24 / 40

What happens to the atomic number of an element during alpha decay?

Decreases by 2

Increases by 1

Remains the same

25 / 40

What element is known for emitting alpha particles and is used in cancer treatment?

Radium

Uranium

Thorium

26 / 40

What is radioactivity?

Emission of particles from unstable nuclei

Absorption of photons by stable nuclei

Emission of light from excited electrons

27 / 40

What particles are emitted in alpha decay?

1 proton

1 neutron

2 protons and 2 neutrons

28 / 40

What is the primary effect of radiation on living cells?

Damage to DNA

Increase in temperature

Decrease in pressure

29 / 40

Which type of radiation is purely energy with no mass?

Alpha particles

Beta particles

Gamma rays

30 / 40

What type of radiation is helium nuclei?

Alpha particles

Beta particles

Gamma rays

31 / 40

Which radioactive isotope is commonly used in dating archaeological artifacts?

Radon-222

Uranium-238

Carbon-14

32 / 40

What type of radiation is composed of high-energy electrons?

Beta particles

Gamma rays

Alpha particles

33 / 40

What process is used to create medical isotopes?

Neutron activation

Evaporation

Filtration

34 / 40

What is a common application of cobalt-60 in industry?

Lubrication

Radiography

Power generation

35 / 40

What is the most common source of natural background radiation?

Cosmic rays

Medical X-rays

Radon gas

36 / 40

How is tritium (hydrogen-3) commonly produced?

During photosynthesis

In natural gas fields

In nuclear reactors

37 / 40

What device is used to detect radiation?

Geiger counter

Barometer

Thermometer

38 / 40

What is the charge of an alpha particle?

-1

2

39 / 40

Which isotope is commonly used in smoke detectors?

Americium-241

Carbon-14

Uranium-238

40 / 40

What is the primary use of technetium-99m in medicine?

Antibiotic production

Cancer treatment

Medical imaging

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