# mass defect and binding energy

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• Created by: syaqub18
• Created on: 28-04-15 14:10
What is mass defect?
Difference between the mass of the nucleus and the mass of its constituents (mass of nucleus is less)
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What is Einstein’s equation?
E=mc^2
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What does Einstein’s equation assume?
That energy and mass are equivalent
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What happens when nucleons are joined together?
Total mass decreases, lost mass is converted in to energy and released, the amount of energy released is the mass defect
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How much energy would you need to pull apart a nucleus?
The energy which was released to join the nucleus (mass defect)
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What is the binding energy?
Energy needed to separate all nucleons in a nucleus which is equivalent to the mass defect
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What is one atomic mass equivalent to?
931.5 MeV
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How do you work out the binding energy per nucleon?
Binding energy per nucleon = (Binding energy AKA mass defect)/ nucleon number
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What is the most stable nucleus?
Iron which has nucleon number 56
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What does a high binding energy mean?
A more stable nucleus
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## Other cards in this set

### Card 2

#### Front

What is Einstein’s equation?

E=mc^2

### Card 3

#### Front

What does Einstein’s equation assume?

#### Back ### Card 4

#### Front

What happens when nucleons are joined together?

#### Back ### Card 5

#### Front

How much energy would you need to pull apart a nucleus?

#### Back 