2021-04-03T15:54:56+03:00[Europe/Moscow] en true Energy level, Ground state, Excited state , Heisenberg's uncertainty principle, Orbital, Sublevel, Elements, Mass number , Isotope, Relative atomic mass, Mass spectrometry, Aufbau principle, Compound, Ions, Ionic bond, Transition metal, Molecule, Sigma bond, Pi bond flashcards

Chemistry definition - Leaving Cert

From ALL chapters . Only includes key words needed for full marks

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  • Energy level
    Fixed energy value an electron in an atom may have
  • Ground state
    Electron occupy the lowest available energy level
  • Excited state
    Electrons occupy higher energy level than the ground state
  • Heisenberg's uncertainty principle
    Impossible to measure both velocity and position of an electron
  • Orbital
    Volume around the nucleus high chance of finding electron
  • Sublevel
    Subdivision of main energy level with one or more orbitals
  • Elements
    Substance that can't be split into simpler substances by chemical means
  • Mass number
    Sum of number of protons and neutron in the nucleus
  • Isotope
    Atom with same atomic number but different mass number due to neutrons
  • Relative atomic mass
    Average sum of mass of isotope relative to one 12th a carbon 12 atom
  • Mass spectrometry
    In a electromagnetic field charged particles are deflected according to their mass
  • Aufbau principle
    In an electron configuration electrons always occupy the lowest available energy level
  • Compound
    Substances made of different elements combined by chemical means
  • Ions
    Charged atom
  • Ionic bond
    Attraction between oppositely charges ions with
  • Transition metal
    Metal that forms an ion with a partially filled d sublevel
  • Molecule
    A group of atoms joined together
  • Sigma bond
    Head on overlap of orbitals
  • Pi bond
    Sideways overlap of p orbitals