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| Name the principal building block of the nucleus: (a Neutron or a Proton |
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| The number of __________ determines the number of electrons and the chemical properties of an atom. |
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| Nucleons are bound together by the ____________ _________. |
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| As the number of protons increase, more ____________ are needed to stabilize the nucleus. |
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| Radioactive elements have unstable ____________ and emit various nuclear particles. |
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| Alpha particles consist of: |
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| _____________ __________ can be stopped by skin or heavy paper. |
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| Beta particles are ___________ from the _____________. |
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| ________________ __________can be stopped by clothing or aluminum foil. |
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| Gamma rays are high energy _________________. |
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| _____________ ________________require heavy shielding such as lead for protection. |
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| Isotopes of an element are chemically identical but differ in their ____________ of _______________. |
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| Term applied to an atom with a nucleus that is unstable and can spontaneously emit a particle and become the nucleus of another element. |
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Term
| T or F: Some isotopes are radioactive. |
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Term
| _______________ is a measure of the decay rate of radioactive isotopes. |
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| __________________ is the changing of one element into another that occurs when a radioactive nucleus emits an alpha or beta particle. |
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| The _________________ elements have been created by artificial transmutation. |
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| ______________________ is used to date wooden artifacts and the remains of plants and animals. |
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| ___________________ is used to date older, non-living materials. |
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Definition
| Uranium-238 238Ur or Uranium-235 235Ur |
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Term
| Radioactive tracers are used in _______________________ and ___________________. |
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Term
| What is the principal role of neutrons? |
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Definition
| Nucleon cement to hold the nucleus together. |
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Term
| A lone neutron is/is not radioactive |
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Term
| Alpha rays have ________ electric charge. |
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| Beta rays have _____________ electric charge. |
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| Gamma rays have _____________ electric charge. |
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Term
| When a neutron is transformed into a proton what is ejected? |
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Term
| Gamma rays are emitted when nucleons jump to an orbit of _____________ frequency in the nucleus. |
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| What is the symbol for a neutron? |
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Definition
| 10N (first # superscripted, second number subscripted) |
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| What is the symbol for a Beta particle? |
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| 0-1E (first # superscripted, second number subscripted) |
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| What is the symbol for Alpha particle? Include Atomic mass # (nucleons) Atomic # (proton) |
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Definition
| 22He (first # superscripted, second number subscripted) |
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