Group 0 - physical properties

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

  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 the same group have similar chemical properties?

  They have the same number of electrons in their outer shell
• What is a substance made of one type of atom only called?

  An element
• What is the definition of a periodic table?

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

  Their lack of chemical reactivity
• What is the smallest part of an element that can exist?

  An atom
• What do physical properties describe?

  The appearance of a substance or how it acts without involving chemical reactions
• What is the boiling point?

  The temperature at which a substance rapidly changes from a liquid to a gas
• What trend is observed in the boiling points of noble gases?

  They all have low boiling points
• What is the boiling point of helium?

  It has the lowest boiling point of any element
• What happens to the attractive forces between atoms as you go down group 0?

  The attractive forces become stronger
• What is the relationship between atom size and intermolecular forces in noble gases?

  As atoms become larger, the intermolecular forces become stronger
• What is energy defined as?

  The capacity of a system to do work
• How much energy is needed to overcome intermolecular forces in noble gases?

  More energy is needed as the attractive forces become stronger
• What can be predicted about the boiling point of radon, which is situated below xenon in group 0?

  Its boiling point is likely to be midway between -100˚C and -50˚C
• What is the actual boiling point of radon?

  • 61.7˚C
• What are the physical properties of noble gases?

  • Low boiling points
  • Exist as single atoms
  • Poor conductors of electricity and heat
• What are the chemical properties of noble gases?

  • Lack of chemical reactivity
  • Do not easily form compounds
• What are the trends in physical properties of elements in group 0?

  • Boiling points increase down the group
  • Atoms become larger down the group
  • Intermolecular forces become stronger down the group
• What is the significance of the noble gases in the periodic table?

  • They are located in group 0
  • They are non-metal elements
  • They have unique properties due to their full outer electron shells