Flashcards
Atomic structure
Flashcards do conjunto (7)
- 1Relative atomic mass: the average mass of an element, taking into account of its isotopes and their relative abundance
- 2ISOTOPES: atoms of same element with different neutronsLine emission:
certain frequencies of light produced by excited atoms/ions when they fall back to ground state - 3Absorption Line: continuous line spectrum except certain colours are absorbed-- not seen-- as a result of atoms excited to higher energy levelsContinuous spectrum:
unbroken sequence of frequencies/ spectrum of visible light - 4excited stateLayman, Balmer, Paschen
- 51st Ionization Energy: min. energy required to remove 1 mol of electrons from 1 mol of gaseous atom, to form 1mol of +ve-ly charged gaseous atomAtomic Orbital:
region around an atomic nucleus in which there is 90% chance of locating an electron - 6Pauli Exclusion Principle: no more than 2 electrons can occupy 1 orbital + electrons spin in opposite directionsAufbau Principle:
electrons placed into orbitals of lowest energy first
- 7exceptions: 3d/4s orbitals close in energy, sensitive to interelectron repulsionHund's rule:
electrons occupy diff orbitals w parallel spins if >1 orbital available in sub-level; minimizes repulsion
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- International Baccalaureate Chemistry FlashCards sobre Atomic structure, criado por cottonumbrella em 22-03-2016.
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- cottonumbrella
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