4.3 Elements in Group 18

• List the first 3 elements in group 18 and their electron arrangement

  Helium, 2

  Neon, 2.8

  Argon, 2.8.8
• What are the characteristics of noble gas

  1. Colorless gas
  2. Monoatomic gas
  3. Does not conduct electricity
  4. Low boiling point
• Why are noble gases monoatomic?

  Because all noble gases have achieved stable electron arrangement, they do not donate, receive or share electrons with other atoms.
• Why do noble gases have low boiling point?

  because it is non metal
• What are Vanderwaal's?

  Van der Waals forces' is a general term used to define the attraction of intermolecular forces between molecules.
• there are 2 types of force of attractions:

  metabollic bond and vanderwaals force of intermolecular force

  metabollic bond: for metal

  vanderwaal force of intermolecular force: for non-metal
• List what happens when going down group 18?

  1. Atomic size increases
  2. Density increases
  3. Boiling point increases
• When going down group 18, why does the atomic size increase?

  Because more shells occupy electron
• When going down group 18, why does the density increase?

  because mass increase faster than volume
• When going down group 18, why does the boiling point increase?

  size of atom increases, vanderwaal's/intermolecular force becomes stronger, more heat is needed to overcome force of attraction
• what are the chemical properties of group 18?

  trick question! group 18 does not have any ;)
• why does group 18 not have any chemical properties?

  because elements react to achieve stability, however group 18 are all stable
• name the usage of all the noble gases

  (Helium, Neon, Argon)

  Helium: Fill up weather balloon

  Neon: Filling gas in advertising light

  Argon: Filling gas in electric bulb