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Atomic structure

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  • What is electronic configuration?
    The distribution of electrons in various orbits.
  • Define an Atom
    Smallest particle of matter
  • The noble gases do not react because
    they have a stable electronic configuration
  • An atom is electrically neutral because
    the number of protons and electrons are equal
  • Cation
    A positively charged ion
  • Define Valency?
    The number of electrons donated or accepted by an atom.
  • elements are chemically reactive because
    they can gain or lose electrons to attain stable configuration.
  • What are ions?
    an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
  • Isotopes
    Atoms with the same number of protons or same atomic number but different numbers of neutrons
  • Define Matter
    Anything that occupies space and has mass
  • Anion
    A negatively charged ion
  • Maximum number of electrons in a shell is given by the formulae
    2n ^2
  • Cation
    A positively charged ion
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