Group 0

• • Group 0 metals are noble gases
• • They have full outer shells - two electrons in helium, eight in the rest
  • They do not need to gain or lose electrons to become stable
  • This means they’re inert - don’t react alot
• • They are monatomic gases - single atoms not bonded to each other
  • Colourless at room temperature
  • non flammable
• Trends: going down the group

  • Boiling points increase - due to increase in number of electrons in each atom, greater intermolecular forces needed to overcome
  • Relative atomic mass increases