Term
| _____________ ___________ occurs when the repelling electrical forces in the nucleus over-power the attracting nuclear strong forces. |
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Definition
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Term
| A _____________ _________ of a fissionable element is required for sustained fission to occur. |
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Definition
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Term
| In a ___________________ mass the fission chain reaction dies out. |
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Definition
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Term
| In a __________________ the fission chain reaction builds up explosively. |
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Definition
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Term
| _____________ __________ are efficient energy producers but generate _____________________ wastes. |
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Definition
Fission reactors
radioactive |
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Term
| After fusion, the total mass of the products is ___________ than the mass of the nuclei that fused. |
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Definition
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Term
| _________________ ______________ occurs at the high temperatures found in the center of the sun and other stars. |
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Definition
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Term
| The splitting of atomic __________ is called nuclear fission. |
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Definition
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Term
| Nuclear fission is when nuclear electrical forces (_______________) overwhelm nuclear strong forces (___________________) and the nucleus splits. |
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Definition
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Term
| What is the symbol for neutron? (w/ Atomic mass # [neutrons and protons] Atomic # [protons]) |
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Definition
| 10N (First number is superscript, second number is subscript) |
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Term
| What is a chain reaction? |
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Definition
| A self-sustaining reaction that continues because the reaction event triggers one or more reaction events. |
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Term
| When a nucleon is removed from a nucleus it gains mass. What is this mass difference related to? |
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Definition
| Binding energy of the nucleus. |
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Term
| Which nucleus has the greatest “binding energy?” |
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Definition
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Term
| How do you calculate the number: mass/nucleon? |
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Definition
| Nuclear mass/ # of nucleons |
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Term
| Why is it a bad thing to have fission of nucleus’ above iron? |
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Definition
| The fragments are radioactive because of the increase number of neutrons needed to bind the nucleus together. |
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Term
| Name the combining of nuclei of light atoms into heavier nuclei accompanied by the release of much energy. |
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Definition
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Term
| T or F: Atomic nuclei are positively charged. |
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Definition
| T – the nucleus only contains protons and neutrons. |
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Term
| For fusion to occur the nuclei must collide at very high/low speeds to overcome electrical repulsion of nuclei. |
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Definition
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Term
| When you have high temperature, you have high ____________________ energy. |
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Definition
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Term
| The temperature in stars is/is not great enough to possess enough Kinetic Energy to slam atoms together to produce fusion. |
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Definition
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Term
| Fusion brought about by high temperatures is called _____________________ _________________. |
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Definition
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