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

What type of radiation is a form of electromagnetic radiation?

Gamma rays

Beta particles

Alpha particles

2 / 40

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

Proton capture

Electron capture

Neutron capture

3 / 40

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

Americium

Uranium

Thorium

4 / 40

What is the primary effect of radiation on living cells?

Damage to DNA

Increase in temperature

Decrease in pressure

5 / 40

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

Skin burns

Bone fractures

Lung cancer

6 / 40

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

Beta particles

Alpha particles

Gamma rays

7 / 40

What is the most common source of natural background radiation?

Medical X-rays

Radon gas

Cosmic rays

8 / 40

What is a common unit to measure radioactivity?

Joule

Becquerel

Newton

9 / 40

What type of radiation is helium nuclei?

Beta particles

Alpha particles

Gamma rays

10 / 40

Which of the following isotopes is used in radiocarbon dating?

Carbon-13

Carbon-12

Carbon-14

11 / 40

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

Dosimeter

Ammeter

Voltmeter

12 / 40

Which radiation is used to sterilize medical equipment?

Beta particles

Gamma rays

Alpha particles

13 / 40

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

Beta decay

Gamma decay

Alpha decay

14 / 40

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

Alpha particles

Beta particles

Gamma rays

15 / 40

What is the charge of an alpha particle?

-1

2

16 / 40

What particles are emitted in alpha decay?

2 protons and 2 neutrons

1 neutron

1 proton

17 / 40

What is radioactivity?

Emission of particles from unstable nuclei

Absorption of photons by stable nuclei

Emission of light from excited electrons

18 / 40

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

Radium

Thorium

Plutonium

19 / 40

What device is used to detect radiation?

Barometer

Geiger counter

Thermometer

20 / 40

What is the main danger of gamma radiation?

Produces sound waves

Penetrates deeply into tissues

Causes burns on the skin

21 / 40

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

Radioactive absorption

Radioactive synthesis

Radioactive decay

22 / 40

Which type of radiation is purely energy with no mass?

Beta particles

Gamma rays

Alpha particles

23 / 40

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

Decay

Fission

Fusion

24 / 40

What particle is emitted in beta decay?

Proton

Electron

Neutron

25 / 40

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

Radium

Thorium

Uranium

26 / 40

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

Decreases by 2

Increases by 1

Remains the same

27 / 40

What material can effectively block beta particles?

Paper

Aluminum foil

Lead sheet

28 / 40

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

Quarter-life

Half-life

Full-life

29 / 40

How is tritium (hydrogen-3) commonly produced?

In natural gas fields

During photosynthesis

In nuclear reactors

30 / 40

What is radon-222 primarily known for?

Being a heavy metal

Being a stable isotope

Being a radioactive gas

31 / 40

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

Diagnose bone fractures

Treat thyroid disorders

Measure blood pressure

32 / 40

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

Beta particles

Alpha particles

Gamma rays

33 / 40

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

Antibiotic production

Medical imaging

Cancer treatment

34 / 40

Which type of radiation is the least ionizing?

Gamma rays

Alpha particles

Beta particles

35 / 40

What process is used to create medical isotopes?

Filtration

Evaporation

Neutron activation

36 / 40

Which radioactive isotope is commonly used in dating archaeological artifacts?

Carbon-14

Uranium-238

Radon-222

37 / 40

Who discovered radioactivity?

Ernest Rutherford

Henri Becquerel

Marie Curie

38 / 40

What is the main purpose of a scintillation counter?

Detect radiation

Control temperature

Measure humidity

39 / 40

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

Lubrication

Radiography

Power generation

40 / 40

Which isotope is commonly used in smoke detectors?

Americium-241

Carbon-14

Uranium-238

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