Group 1 elements

• What are group 1 metals known as?


  Alkali metals
• What are the alkali metals?


  Lithium, sodium, potassium, rubidium, cesium, and francium.
• How many electrons do the alkali metals have on their outer shell?


  1
• What properties do alkali metals have?


  Soft, low density
• What happens to reactivity of alkali metals as you go down the group?


  Increases
• Alkali metals have lower melting and boiling points.
• Alkali metals have a higher relative atomic mass.
• Group 1 elements don’t need much energy to lose their one outer electron, so they readily form 1+ ions.
• What is formed when an alkali metal loses its outer electron?


  Ionic compounds.
• What happens when group 1 metals react with water?


  Hydrogen gas is produced alongside metal hydroxides.
• What happens when group 1 metals react with chlorine?


  Metal chloride salts formed.
• What forms when group 1 metals react with oxygen?


  Metal oxides
• How do group 1 metals react with water or oxygen?


  Vigorously.