Atoms and Radioactivity

The nucleus of an atom consists of which particles?

• neutrons

• protons and neutrons

• neutrons and electrons

• protons and electrons

The atom has an overall charge of zero. If electrons are removed from the atom what will the overall charge now be?

• Positive

• Negative

• Neutral

• There is not enough information

What does the atomic number of an atom represent?

• the number of protons in the atom

• the number of electrons in the atom

• the number of protons and neutrons in the atom

• the total number of subatomic particles in the atom

Which of the following is an isotope of carbon?

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Ionising radiation is emitted from unstable nuclei. What does the term ionisation mean?

• Ionisation is the loss or gain of electrons.

• Ionisation is an atom of the same element with more neutrons.

• Ionisation is the gaining of protons.

• Ionisation is the gaining of both protons and neutrons.

There are three main types of ionising radiation. What are they?

• alpha, bravo, delta

• alpha, beta and gamma

• alpha, beta and phi

• protons, alpha and gamma

Alpha radiation consists of which particles?

• two protons and two electrons

• two protons and two neutrons

• an electron

• a proton

Which of the following are properties of alpha radiation?

• short range in air

• slow moving particle

• has a +2 relative charge

• all of the above

Which of the following is not a property of beta radiation?

• has a −1 relative charge

• fast moving particle

• can penetrate a thick lead sheet

• lightweight particle

A Radium-222 atom undergoes alpha decay. What would be the daughter nuclei of this decay?

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