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Physics 2.5
Particle Reactions
| Term | Definition |
|---|---|
| Antiparticles | Particle with the same properties but opposite charge |
| Annihilation | when a positron and electron collide and convert their combined masses into a form of energy |
| Antimatter | particles such as the positron, the antiproton, and the antineutron |
| Orbital | region of high likelihood for finding an electron as it travels around the nucleus |
| Electron absorption | When an electron is absorbed by a proton when it travels close to the nucleus |
| Alpha decay | when a nucleus emits a high-energy particle of two protons and two neutrons |
| Beta decay | when a neutron’s down quark changes into an up quark, changing the neutron into a proton and forcing the emission of an electron |
| Half life | Time required for half of a radioactive substance to decay into something else |
| Describe an alpha particle | a reactive helium cation (no electrons) with more energy than a normal helium atom, the heavy element’s identity is changed to an element with two fewer protons |
| Describe a beta particle | has a higher amount of energy than other electrons still orbiting the nucleus |
| Radioactive decay | result of a release of energy caused by atoms with an unequal amount of protons and neutrons |
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