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Group 1 - Alkali

Properties -

  1. Good conductors of heat and electricity
  2. Softer
  3. Low density
  4. Low melting and boiling point

Trends -

  1. density - INCREASES
  2. melting and boiling point - DECREASES
  3. reactivity - INCREASES

Group 7 - Halogens - Diatomic

Properties -

  1. 7 valence electrons
  2. Exist as diatomic
  3. Don't conduct electricity (Because its non-metal)
  4. Brittle - S
  5. Poisonous -G

Trends -