Quiz 12 - Combined H/F: Radioactivity

What is an ion?

• An atom that has gained or lost an electron.

• A different version of an element.

• An atom with the same number of protons and electrons.

• An unstable element.

Which type of radiation has the least penetrating power?

• Alpha

• Beta

• Beta +

• Gamma

What is the mass of a beta particle?

• 4

• 0.0005

• 1

• None

Which material can stop gamma radiation?

• Paper

• Aluminium

• Lead

• Wood

What piece of equipment measures radioactivity in Bequerels?

(a)  

What is the term for the amount of time it takes for half the radioactive nuclei to decay?

• Decay time

• Half-life

• Radioactive period

• Ionizing time

What happens to the atomic number during beta-minus decay?

• It increases by 1.

• It decreases by 1.

• It remains the same.

• It doubles.

What is the main source of background radiation?

• Medical x-rays and gamma rays

• Food and drink

• Buildings

• Radon gas in the air

What is the main danger of radiation exposure?

• Mutates cells

• Causes fatigue

• Increases appetite

• Improves vision

What is the best protection against radiation?

• Lead lined containers

• Wooden barriers

• Plastic shields

• Glass screens