group 1 elements

• they all have 1 electron in their outershell making them very reactive
• alkali metals of group 1 are soft and have low density
• as you go down group 1, the reactivity increases as the outer electron shells get further away from the nucleus so there is less attraction
• as you go down group 1 , they have lower boiling and melting points
• alkali metals form ionic compounds with non metals as they loose an electron
• reacting alkaline metals with water creates a metal hydroxide and hydrogen gas
• reacting alkaline metals with chlorine form salts called metal chlorides
• reacting alkaline metals with oxygen produces a metal oxide