Group 0(noble gases)

• Noble gas

  • Unreactive(inert)
  • Colourless gas at room tempature
  • Single atoms
  • don't easily form molecules
• Why is Noble gases Unreactive?

  Have full outer shell of electrons so there stable
• Why does melting/boiling and relative atomic mass increase down the group?

  Larger atoms have strong intermolecular forces between them need more energy to overcome these forces and become gas
• Why is helium used in airships and balloons?

  Less dense than air so can rise and inert so it's safe to usr
• Why is neon used in neon lighting on signs

  Inert and grows red when electrons are fired at it
• Why is argon used as insulator in industrial processes?

  Inert, non-flammable, poor conductor of heat
• Does density increase or decrease down group?


  Increase