REACTIONS

• REACTIONS WITH WATER?

  SODIUM

  • 2Na (s) + 2H2O (l) -> 2NaOH (aq) + H2 (g)
  • vigorous
  • floats/ moves on water
  • fizzes
  • may catch on fire (yellow-orange flame)

  MAGNESIUM

  • Mg (s) + 2H2O (l) -> Mg(OH)2 (aq) + H2 (g)
  • very slow
  • Mg (s) + H2O (g) -> MgO (s) + H2 (g)
  • white flame
  • white powder

  CHLORINE

  • Cl2 + H2O ⇋ HCl + HOCl
  • dissolves
  • very pale green solution
• REACTIONS WITH OXYGEN?

  Na

  • 2Na (s) + 1/2O2 (g) -> 2Na2O (s)
  • yellow-orange flame
  • white powder

  Mg

  • 2Mg (s) + O2 (g) -> 2MgO (s)
  • white flame
  • white powder

  Al

  • 4Al (s) + 3O2 (g) -> 2Al2O3 (s)
  • white flame
  • white powder

  Si

  • Si (s) + O2 (g) -> SiO2 (g)
  • white flame
  • white powder

  P

  • 4P (s) + 5O2 (g) -> P4O10 (s)
  • heat
  • very bright white flame
  • white powder

  S

  • S (s) + O2 (g) -> SO2 (g)
  • blue flame
  • choking gas