Flashcards
Particles and radiation definitions
Cards in this deck (18)
- 1Specific chargeThe ratio of the charge of an ion or particle to it's mass
- 2Strong nuclear forceThe force that holds everything together
- 3Proton number Z (atomic number)The number of protons in a given nucleus
- 4Nucleon number A (mass number)The total number of protons and neutrons in a given nucleus
- 5Neutron number NThe number of neutrons in a nucleus
- 6IsotopeAn isotope of an element has the same number of protons but a different number of neutrons
- 7Random decayImpossible to predict when a nucleus will decay or impossible to predict which nucleus will decay
- 8Spontaneous decayThe decay cannot be induced and cannot be influenced by external factors
- 9Alpha emissionThe nucleus emits 2 protons and 2 neutrons which are tightly bound (a helium nucleus)
- 10Beta - emissionA neutron decays into a proton, electron and an antineutrino (proton remains in nucleus)
- 11Beta + emissionA proton decays into a neutron, positron and a neutrino (the neutron remains in nucleus)
- 12Gamma emissionReduces the energy of the parent nucleus but does not change it's nuclear composition. A gamma photon is emitted by a nucleus with too much energy following an alpha of beta decay
- 13AnnihilationA particle and anti-particle of the same velocity an energy meet and two photons are produced
- 14Pair productionA photon interacts with a nucleus and produces a particle-antiparticle pair
- 15Strong nuclear forceActs between quarks, holds nucleus together
- 16Weak nuclear forceActs on all particles, responsible for; beta decay, electron capture, electron-proton collision, nuclear fusion
- 17Electromagnetic forceActs between charged particles, holds atoms together, responsible for everyday forces
- 18Gravitational forceActs between particles with mass
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- A level Physics (Particles and Radiation) Flashcards on Particles and radiation definitions, created by Molli Forber on 19/08/2018.
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- Molli Forber
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