Group 1

• Group 1


  Alkali metals
• Group 1 trends 


  • Density increases as you go down group 1
  • Reactivity increases as you go down group 1
  • Melting point increases as you go down group 1
• Predict, describe and explain the reactivity trend down group 1


  1. increased number of shells in the atom
  2. increased distance of the outer electrons from the nucleus
  3. decrease in electrostatic attraction between the nucleus and the outer shell electrons
  4. decrease in energy needed to remove electrons from outer shell
  5. increased reactivity. 
• Lithium + Water ----> Lithium hydroxide + Hydrogen
• Sodium + Water ----> Sodium hydroxide + Hydrogen
• Potassium + Water ----> Potassium hydroxide + Hydrogen
• Observations of group 1 metals when added to water

  Observations of group 1 metals when added to water

  A) Lithium

  B) Sodium

  C) Potassium