What does each alpha particle consist of, what is its charge and what do you compare an alpha particle to
Two protons and two neutrons, a charge of +2e and a helium nucleus
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What charge does a beta plus particle have and a beta minus particle
Beta plus particle has a +e charge and a beta minus has a charge of -e
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Where are alpha beta and gamma radiation emitted from and why
The nuclei of atoms as a result of changes within unstable nuclei
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List in order from strongest ionisation to weakest out of alpha beta and gamma
Alpha beta then gamma
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What absorbs an alpha particle completely
A thin sheet of paper
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What stops (absorbs)a beta particle
1-3mm of aluminium
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What absorbs a gamma ray
Few centimetres of lead
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Give two reasons why radioactive decay is random
You can neve predict when a particular nucleus in a sample will decay or which one will decay next and the other reason is because each nucleus in the sample has the same chance of decaying per unit time
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Give two reasons why radioactive decay is spontaneous
It's not affected by external factors such as pressure. It's not affected by the presence of other nuclei in the sample
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What is half life of an isotope
The average time it takes for half the number of active nuclei in the sample to decay
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What is the activity of the source
The rate at which nuclei decay or disintegrate
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State the equation for the activity A
A=λN
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Define the decay the constant
The probability of decay of an individual nucleus per unit time
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What is carbon dating
Comparing the activities or ratio of carbon-14 to carbon-12 of the nuclei of the dead material with its similar living material
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In beta minus decay does neutron become proton or proton become neutron
Neutron becomes proton
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What's r h quark transformation of beta plus decay
Up quark to down quark
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Other cards in this set
Card 2
Front
What does each alpha particle consist of, what is its charge and what do you compare an alpha particle to
Back
Two protons and two neutrons, a charge of +2e and a helium nucleus
Card 3
Front
What charge does a beta plus particle have and a beta minus particle
Back
Card 4
Front
Where are alpha beta and gamma radiation emitted from and why
Back
Card 5
Front
List in order from strongest ionisation to weakest out of alpha beta and gamma
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