C2 - Periodic Table

• Why do elements in a group have similar chemical properties?

  They have the same number of electrons in their outer shell
• Where are metals and non-metals located on the Periodic Table?

  Metals to the left

  Non-Metals to the right
• Why does the reactivit of Alkali Metals (Group 1) increase down the group?


  Atoms get progressively larger.

  The outermost electron is the furtherst from the nucleus - meaning there are weaker electrostatic forces of attraction and more shielding between the nucleus and outer electron, so its easier to lose the electron.
• Metals

  • High boiling/melting point
  • High conductivity of heat and electricity
  • Shiny appearance
  • Malleable
  • High density
  • Form basic oxides
• Non-metals

  • Low boiling/melting point
  • Low conductivity of heat and electricity (with exception of graphite)
  • Dull appearance
  • Brittle
  • Low density
  • Form acidic oxides
• State 5 Characteristics of Group 7

  Coloured Vapours

  Diatomic Molecules

  Form ionic salts wirh metals

  Form molecular compounds with non-metals