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Dougherty Flash Cards
A2 Physics
10
Physics
Not Applicable
08/09/2017

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Cards

Term
What is the mass defect?
Definition
The mass of a nucleus is less than the sum of masses of it's constituent protons and neutrons.
Term
What is the binding energy?
Definition
The energy required to separate a nucleus in to it's constituent protons and neutrons.
Term
Relationship between binding energy and stability of the nucleus.
Definition
Proportional
Term
What is Nuclear Fission
Definition
Nuclear reaction where a large nuclei breaks down in to smaller ones.
Term
What is Nuclear Fusion?
Definition
Nuclear reaction where 2 or more atomic nuclei join to form a single heavier nucleus. Larger release of energy than fission.
Term
Define radioactivity activity
Definition
Activity (A)-The number of nuclear disintegrations per unit time, unit Bq.
Term
Define the radioactivity decay constant.
Definition
Decay Constant (Lander)-Theprobability of decay per unit time of nucleus.
Term
Define radioactivity half life.
Definition
The time taken for half the nuclei in a sample of nuclide to decay.
Term
Radioactive Decay
Definition
Can't be influenced by environmental factors which is indicative of the spontaneous nature of radioactive decay.

The rate of decay is directly proportional to the number of unstable nuclei present.
Term
What does the bumpiness of the radioactive decay graph represent?
Definition
The random nature of radioactive decay.
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