Group 0 Elements C1

• What is the electronic structure of helium?

  Helium has two electrons in the first energy level.
• Why are noble gases unreactive?

  They have a full outer energy level, making them stable.
• What is the first noble gas mentioned in the material?

  Helium
• How many electrons does neon have in its outer energy level?

  Neon has eight electrons in its outer energy level.
• What is the maximum number of electrons that the second energy level can hold?

  The second energy level can hold a maximum of eight electrons.
• What is the electronic structure of argon?

  Argon has eight electrons in its outer energy level.
• What is the significance of having a full outer energy level for noble gases?

  It makes them unreactive.
• How do the boiling points of noble gases vary down the group?

  • All noble gases have boiling points lower than room temperature.
  • Boiling points increase as the relative atomic mass increases.
  • Helium has the lowest boiling point, while radon has the highest.
• What is the relative atomic mass of helium?

  Helium has a relative atomic mass of 4.
• What is the relative atomic mass of radon?

  Radon has a relative atomic mass of 222.
• Why are all noble gases gases at room temperature?

  Because they have boiling points lower than room temperature.
• Who produced the original periodic table that did not feature group zero?

  Dimitri Mendeleev
• What is the key fact about all noble gases regarding their outer energy levels?

  All noble gases have a full outer energy level.
• How does the stability of noble gases relate to their reactivity?

  The stability from a full outer energy level leads to their unreactivity.