Group 0 - physical properties

• What is the vertical column of non-metal elements on the far right of the periodic table called?

  Group 0, or noble gases
• What do elements in the same group of the periodic table show trends in?

  Physical properties, such as boiling point
• Why do elements in group 0 have similar chemical properties?

  They have the same number of electrons in their outer shell
• What are the characteristics of elements in group 0?

  • Non-metal elements
  • Poor conductors of electricity and heat
  • Form acidic oxides
  • Exist as single atoms
• What is an element?

  A substance made of one type of atom only
• What is the periodic table?

  A tabular representation of all known elements in order based on atomic number
• What are noble gases known for?

  Their lack of chemical reactivity
• What happens to the boiling points of noble gases as you go down group 0?

  The boiling points increase
• Which noble gas has the lowest boiling point?

  Helium
• What is boiling point?

  The temperature at which a substance rapidly changes from a liquid to a gas
• What causes the boiling points of noble gases to increase as you go down the group?

  The attractive forces between the atoms become stronger
• What are intermolecular forces?

  Weak attractive forces between molecules
• What is required to overcome intermolecular forces during boiling?

  More energy
• If radon is situated below xenon in group 0, what can be predicted about its boiling point?

  It is likely to be higher than xenon's boiling point
• What is the actual boiling point of radon?

  • 61.7˚C
• How can one estimate the boiling point of radon based on the graph?

  It would lie midway between -100˚C and -50˚C
• What are the physical properties of noble gases?

  • Low boiling points
  • Exist as single atoms
  • Show trends in physical properties
• What is the relationship between atomic size and boiling point in noble gases?

  • As atomic size increases, boiling point increases
  • Larger atoms have stronger intermolecular forces