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Chem PMP3 Radioactiv
Radioactive Reactions
| Question | Answer |
|---|---|
| Isotope | any ot two or more atoms of an element that are chemically alike but have different matter. |
| Isotope Notation | Atomic Mass on left top; Atomic No. on left bottom of Chemical symbol |
| Mass Number | sum of neutrons and protons in the nucleus of an atom |
| Proton | a particle with a positive electric charge equal in magnitude to that of an electron bit of an opposite sign; located nucleus |
| Neutron | a subatomic particle of about the same mass as a proton but w/o an electric charge; located in the nucleus |
| Electron | a stable subatomic particle with a charge of negative electricity |
| Ion | an atom of group of combined atoms that has a charge b/c loss or gain of electrons |
| Anion | a negatively charged ion, one that would be attracted to the anode in electrolysis |
| Cation | a positively charged ion, one that would be attracted to the cathode in electrolysis |
| A | atomic mass |
| Z | atomic no. |
| Half-life | the time taken for the radioactivity of a specified isotope to fall to half its original value |
| Alpha Particle | a helium nucleus emitted by some radioactive decay of substances |
| Beta Particle | a fast-moving electron emitted by some radioactive substance |
| Gamma Ray | penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei |
| Decay | change from an element into a different element, usually with some other particles & energy emitted |
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