Group 1 Metals

The elements in Group 1 of the Periodic Table are called the alkali metals. They include lithium (Li), sodium (Na) and potassium (K).

Physical Properties

  • Easy to cut
  • Shiny when freshly cut
  • Low density

Chemical Properties

  • Metals are very reactive with chemical reactivity increasing down the group.
  • All the metals react :
    • :with oxygen to form oxides e.g. Li2O
    • :with water to form hydroxides and hydrogen e.g. KOH
    • : with halogens to form halides e.g. NaOH

Alkali Metal Compounds

  • All alkali metal compounds are stable, this is because the alkali metals are so reactive.
  • Alkali metals have to be extracted from their ores by electrolysis
  • Alkali metal compounds are usually colourless
  • The hydroxides are strong alkalis

Alkali metals

This video explains Group 1 metals


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