Definitions for alkali metal

This page provides all possible meanings and translations of the word alkali metal

Random House Webster's College Dictionary

al′kali met`al(n.)

  1. any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium, and francium, whose hydroxides are alkalis.

    Category: Chemistry

Origin of alkali metal:

1880–85

Princeton's WordNet

  1. alkali metal, alkaline metal(noun)

    any of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium)

    "the hydroxides of the alkali metals are strongly alkaline"

Wiktionary

  1. alkali metal(Noun)

    Any of the soft, light, reactive metals of Group 1 of the periodic table; lithium, sodium, potassium, rubidium, cesium, and francium.

Freebase

  1. Alkali metal

    The alkali metals are a group in the periodic table consisting of the chemical elements lithium, sodium, potassium, rubidium, caesium, and francium. This group lies in the s-block of the periodic table as all alkali metals have their outermost electron in an s-orbital. The alkali metals provide the best example of group trends in properties in the periodic table, with elements exhibiting well-characterized homologous behaviour. The alkali metals have very similar properties: they are all shiny, soft, highly reactive metals at standard temperature and pressure and readily lose their outermost electron to form cations with charge +1. They can all be cut easily with a knife due to their softness, exposing a shiny surface that tarnishes rapidly in air due to oxidation. Because of their high reactivity, they must be stored under oil to prevent reaction with air, and are found naturally only in salts and never as the free element. In the modern IUPAC nomenclature, the alkali metals comprise the group 1 elements, excluding hydrogen, which is nominally a group 1 element but not normally considered to be an alkali metal as it rarely exhibits behaviour comparable to that of the alkali metals. All the alkali metals react with water, with the heavier alkali metals reacting more vigorously than the lighter ones.

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