N5 Radiation

Which row describes alpha (α), beta (β) and gamma (γ) radiations?

• A

• B

• C

• D

• E

Alpha radiation ionises an atom.

Which statement describes what happens to the atom?

• The atom splits in half.

• The atom releases a neutron.

• The atom becomes positively charged.

• The atom gives out gamma radiation.

• The atom releases heat.

Which row in the table shows how the mass and charge of an alpha particle compares to the mass and charge of a beta particle?

• A

• B

• C

• D

• E

During ionisation an atom becomes a positive ion.

Which of the following has been removed from the atom?

• An alpha particle

• An electron

• A gamma ray

• A neutron

• A proton

Which of the following describes the term ionisation?

• An atom losing an orbiting electron.

• An atom losing a proton.

• A nucleus emitting an alpha particle.

• A nucleus emitting a neutron.

• A nucleus emitting a gamma ray.

Which row in the table shows the paths taken by alpha particles and gamma radiation as they pass through a uniform electric field between two metal plates?

• A

• B

• C

• D

• E

A student makes the following statements.

I The nucleus of an atom contains protons and electrons.

II Gamma radiation produces the greatest ionisation density.

III Beta particles are fast moving electrons.

Which of the statements is/are correct?

• I only

• II only

• III only

• I and III only

• II and III only

A radioactive source emits alpha, beta and gamma radiation. A detector, connected to a counter, is placed 10 mm in front of the source. The counter records 400 counts per minute.

A sheet of paper is placed between the source and the detector. The counter records 300 counts per minute.

The radiation now detected is

• alpha only

• beta only

• gamma only

• alpha and beta only

• beta and gamma only

A student makes the following statements about ionising radiations.

I Ionisation occurs when an atom loses an electron.

II Gamma radiation produces greater ionisation (density) than alpha particles.

III An alpha particle consists of 2 protons, 2 neutrons and 2 electrons.

Which of the statements is/are correct?

• I only

• II only

• I and II only

• II and III only

• I, II and III

A uniform electric field exists between two oppositely charged parallel metal plates.

An alpha particle, a beta particle and a gamma ray each pass between the metal plates.

They follow different paths as shown.

• A

• B

• C

• D

• E