Radioactivity

What is the unit for activity?

• Fusion
• Fission
• Becquerel

How many protons are there in the Uranium isotope below:

• 92
• 235
• 143

How many neutrons are there in the Uranium isotope below:

• 92
• 235
• 143

How many electrons are there in the Uranium isotope below:

• 92
• 235
• 143

What is an isotope (select two)

• Elements that have the same atomic number and the same mass number
• Elements that have the same atomic number and different mass numbers
• Elements that have the same number of protons but different numbers of neutrons
• Elements that have the same number of protons and neutrons

What is an alpha particle made of (select two)

• A Helium nucleus
• A fast moving electron
• High energy electromagnetic radiation
• Two protons and two neutrons

What is an beta particle made of?

• A Helium nucleus
• A fast moving electron
• High energy electromagnetic radiation
• Two protons and two neutrons

What is gamma radiation made of?

• A Helium nucleus
• A fast moving electron
• High energy electromagnetic radiation
• Two protons and two neutrons

What causes radioactive decay?

• An unstable nucleus
• A stable nucleus

Which is the most ionising?

• Alpha
• Beta
• Gamma