Topic Overview - Radioactivity Quiz

#1. Which device do we usually use to measure the radioactivity of a source?

A Geiger-Müller tube

A pulsinometer

A newtonmeter

#2. Which three particles are atoms composed of?

enter answer here...

#3. What is the approximate radius of a nucleus?

1 x 10⁻¹⁵

1 x 10⁻⁵

1 x 10⁻⁴

1 x 10⁻³

#4. What is gamma radiation?

two protons and two neutrons but no electrons

two neutrons without any protons

an electron

high frequency electromagnetic radiation

#5. A GM tube is often connected to a counter which clicks each time radiation is detected. What do we call the number of clicks per second or minute?

Count rate

Exposure ratio

CPM

#6. Ionising radiation can penetrate materials. Which is the correct order of types from least penetrating to most penetrating?

Beta, Alpha, Gamma

Alpha, Beta, Gamma

Gamma, Beta, Alpha

#7. Medical staff often need to monitor their exposure to radiation from things like x-rays. Which device made of photographic film is sometimes worn by medical staff?

Dosimeters

GM tubes

Becquerel slides

#8. Which scientist proposed the Plumb Pudding Model?

JJ. Thomson

Ernest Rutherford

John Dalton

#9. What is the charge of a proton?

+1

-1

0

#10. What is the charge of an electron?

+1

-1

0

#11. What is an isotope?

an atom that has gained or lost electrons

two neutrons without any protons

an atom which has a different number of neutrons

#12. What is the relative mass of a proton?

1

2

1/1840

#13. What are cosmic rays?

High-energy charged particles coming from the Sun, other stars and various other objects in space

Alternating wavelength waves that oscillate between radiowaves and infrared every 2 seconds

Micrometeorites that enter the atmosphere in the form of waves due to the Earth's magnetic field

#14. What is the single largest source of background radiation?

Radon gas

Medical sources - e.g. x-rays

Cosmic rays

Nuclear fission

#15. Which of the following was the Rutherford Model of atomic structure?

A mass of positively charged material with negatively charged electrons distributed throughout it

A central nucleus containing protons and neutrons, surrounded by electrons

#16. What does the atomic number of an element mean?

The number of protons in its nucleus

The number of neutrons in its nucleus

The number of electrons in shells surrounding the nucleus

#17. Where does naturally occurring radon gas come from?

Uranium containing rocks

Potassium rich soils that spontaneously produce molecules of radon

Occasional collisions between nitrogen and francium in the atmosphere that fuse to form radon

#18. Complete the sentence: Radiation passing through a Geiger-Müller tube ......... gas inside it and allows a short pulse of current to flow.

ionises

redirects

vaporises

#19. In 1897 JJ. Thomson did a series of experiments that led to the discovery of which particles?

Electrons

Protons

Neutrons

Alpha particles

#20. Scientists measuring a radioactive source would also be measuring background radiation. How would scientists accurately measure the radioactivity of a source whilst ignoring the influence of background radiation?

Take several measurements of the background radiation, calculate a mean and then subtract this mean from the measurements of the radioactive source

Move the radioactive source to an area with lower background radiation and then measure it

Use a counter-radioactive source to cancel out the background radiation, then take the measurement of the radioactive source

Topic Overview - Radiactivity Quiz

Good Luck!

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