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Alkali Metals definitions

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  • Alkali Metals
    Elements in group 1A of the periodic table, excluding hydrogen, known for forming basic solutions.
  • Molar Mass
    The mass of a given substance divided by the amount of substance, lower in alkali metals.
  • Atomic Radii
    The size of an atom, larger in alkali metals compared to other elements in the same period.
  • Electron Configuration
    Arrangement of electrons in an atom, alkali metals have an ns1 configuration.
  • Valence Electron
    An outer shell electron that is associated with an atom, alkali metals have one.
  • Ionization Energy
    The energy required to remove an electron from an atom, low in alkali metals.
  • Cation
    A positively charged ion, alkali metals commonly form +1 cations.
  • Malleability
    The ability of a metal to be shaped or molded, a property of alkali metals.
  • Exothermic Reaction
    A chemical reaction that releases energy by light or heat, common in alkali metals with water.
  • Oxidation Number
    A number assigned to an element in chemical combination, indicating the number of electrons lost or gained.
  • Peroxide
    A compound containing an oxygen-oxygen single bond, formed by sodium with oxygen.
  • Superoxide
    A compound containing the superoxide ion, formed by potassium, rubidium, and cesium with oxygen.
  • Halogens
    Elements in group 7A of the periodic table, react with alkali metals to form ionic halides.
  • Ionic Halide
    A compound formed from the reaction of alkali metals with halogens.
  • Radioactive
    Emitting or relating to the emission of ionizing radiation or particles, a property of francium.