Radioactivity and Radiation

1.What do you call the centre of an atom?

• electron

• nucleus

• proton

• neutron

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How many types of radiation are there?

• 3

• 9

• 2

• 4

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Radiation is emitted from:

• all atoms

• most atoms

• unstable atoms

• stable atoms

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An alpha particle consists of:

• 2 protons

• A high speed electron

• A wave

• 2 protons and 2 neutrons

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NGSS.HS-PS1-8

Beta radiation is:

• 2 protons

• the same size and mass as an electron

• A wave

• 2 protons and 2 neutrons

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Gamma radiation is:

• 2 protons

• A high speed electron

• bursts of energy released after alpha or beta particles are emitted.

• 2 protons and 2 neutrons

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Alpha is stopped by:

• Thick lead

• a piece of paper

• A few cm of air

• Aluminium

Beta is stopped by:

• A few centimetres of wood

• Paper

• Lead

• Concrete

Gamma is mostly stopped by:

• A few cm of air

• many centimetres of lead

• Aluminium

• Paper

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The rate at which nuclear decay takes place is called:

• gamma decay

• quarter life

• half-life

• isotope

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