Group 1 Metals

• Properties

  -Soft

  -Reactivity increases as you go down the group

  -Low density

  -Low melting point

  -One electron in outer shell
• Why does reactivity increase?

  Atom get larger going down group so outer electron moves further away from nucleus so forces of attraction is weak so electron is more easily lost 
• Reactions of Alkali Metals

  -Metal+Oxygen——>Metal Oxide

  -Metal+Water——->Metal Hydroxide+Hydrogen

  (Test Hydrogen via squeaky pop test)

  -Metal+Chlorine——>Metal Chloride

  (Chlorine-Green Gas)  (Metal Chloride-White Salt)