Flashcards
definitions,
Cards in this deck (13)
- 1Daltons atomic theoryAll matter is made up of particles called atoms. Atoms are indivisible and they can neither be created or destroyed
- 2MatterAnything that occupies space or has mass
- 3William crookesCathode rays are made up of negative particles.
- 4J.J ThompsonRays are negative. Pass through parallel plates.
- 5StoneyNamed them electrons
- 6MilikainOil drop experiment. Discovered charge of electron.
- 7Plum Pudding ModelSolid positive sphere with electrons imbedded.
- 8RutherfordDiscovered nucleus. Fired alpha particle at gold foil. Deflected. Small dense area of positive mass. Protons bombarded element with alpha particles knocked off positive particles.
- 9ChadwickNeutron. Fired alpha particles at beryllium.
- 10Energy LevelThe fixed energy value an electron of an atom may have.
- 11Heinsburgs Uncertainty PrincipleIt is impossible to study at the same time both the velocity and the position of an electron.
- 12An orbitIs an area where an electron can be found
- 13An OrbitalA region in space where there is high probability of finding an electron
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- leaving cert chemistry (the atom) Flashcards on definitions,, created by alannahsmyth305 on 01/06/2014.
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- alannahsmyth305
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