Unit 5 Definitions

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Rutherford Scattering
Beam of alpha particles directed towards a positively charged nucleus to find the size of the nucleus - only a small amount of alpha particles are deflected
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Activity
The number of atoms that decay per second
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Half Life of an Isotope
Average time it takes for the number of undecayed atoms to halve
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Mass defect/Binding Energy
The energy needed to separate all the nucleons in a nucleus
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Spontaneous Fusion
A large nucleus splits naturally into two smaller nuclei
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Boyle's Law
At a constant temperature the pressure and volume of a gas are inversely proportional
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Charles' Law
At constant pressure, the volume of a gas is directly proportional to its absolute temperature
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The Pressure Law
At constant volume, the pressure of a gas is directly proportional to its absolute temperature
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Specific Heat Capacity
the amount of energy needed to raise the temperature of the substance by 1K
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Specific Latent Heat
Quantity of thermal energy required to change the state of 1Kg of a substance
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Absolute Zero
The lowest possible temperature
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Thermal Neutrons
The particles that cause fission
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Fusion
The joining of two small nuclei to form a larger stable nucleus
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Radioactive Isotopes
Substances that emit nuclear radiation
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Alpha Particle
Helium Nucleus
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1 Becquerel
One disintegration per second
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Other cards in this set

Card 2

Front

The number of atoms that decay per second

Back

Activity

Card 3

Front

Average time it takes for the number of undecayed atoms to halve

Back

Preview of the back of card 3

Card 4

Front

The energy needed to separate all the nucleons in a nucleus

Back

Preview of the back of card 4

Card 5

Front

A large nucleus splits naturally into two smaller nuclei

Back

Preview of the back of card 5
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