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Description
Flashcards by Shoshanna Zemel , updated more than 1 year ago
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Created by Shoshanna Zemel
about 8 years ago
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| Question | Answer |
| Nuclear Chemistry? | particles emitted from an unstable nuclei. |
| what is radiation? | The emission of energy or particles through space or a medium. |
| Describe how radioactivity was discovered? | Henri bexquerel discovered radioactivity when observing uranium salts. |
| Why is radiation harmful to both living and nonliving things? | Radiation can damage DNA in living things and can alter nonliving things yo make them harmful. |
| Identify three uses of radiation? | Medical, Industrial and power. |
| Assume that an isotope has 83 proton and 83 neutron.Is it radioactive? why or why not? | The isotope is stable because of the ratio of protons and neutrons. |
| What is radioactive decay? | The spontaneous breakdown of atomic nuclei. |
| Define half-life? | The time taken for the radioactivity of a specificed isotope to fall to half its original value. |
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