Group 1

• Metal + water -> ?

  Metal hydroxide + hydrogen
• Why does alkali metals get more reactive down the group

  This happens because there is a force of attraction between positive nucleus and negative outer electron
• How is the outer electron lost more easily?

  As you go down group 1 the atoms radis increases. This means the force of attraction between nucleus and electron decreases so outer electron is lost more easily
• Lithium + water -> lithium hydroxide + hydrogen


  Li + H20 -> LiOH + H2
• What is balanced equation if lithium reaction with water

  2Li + 2H20 -> 2LiOH + H2
• Group 1 metals are soft, low density(reason why they float above water in reactions) and low melting point
• As you go down group 1:

  • Metals become more reactive
  • Melting and boiling points decrease
• Why does reactivity increase in group 1

  Atoms become larger and outer electron becomes further from nucleus so electrostatic attraction between positive nucleus and outer negative electron decrease meaning outer electron is lost more easily and element is more reactive
• How does pottasium react?

  Forms ball,Catches on fire with a lilac flame,
• Why are lithium and sodium and pottasium in group 1

  They have 1 electron on outer shell