2.1.2

• group 1 ions


  1+
• Group 2 ions


  2+
• Group 3 ions


  3+
• Group 5 ions


  3-
• Group 6 ions


  2-
• Group 7 ions


  1-
• hydroxide ion


  OH-
• ammonium ion


  NH4+
• zinc ion


  Zn^2+
• nitrate ion


  NO3^-
• carbonate ion


  CO3^2-
• sulfate ion


  SO4^2-
• ammonium ion


  NH4^+
• silver ion


  Ag^+
• liquid state symbol = l
• solid state symbol = s
• aqueous (in water) state symbol = aq
• gas state symbol = g
• ionic equation: the ions dissolved in the aqueous solution are written individually with charges
• spectator ion: no reduction or oxidation occurs it stays in aqueous form and doesn't change state