Atomic Structure & Periodic Table

• What is the structure of an atom?

  An atom consists of a nucleus containing protons and neutrons, surrounded by electrons in energy levels.

  
• What is the atomic number?

  • tells you how many protons there are in an atom
  • the bottom number
• What are the features of the periodic table?

  • horizontal rows are called periods
  • vertical columns are called groups
• What is the name of group 1?

  Alkali metals
• What is the name of group 2?

  Alkaline Earth Metals
• What is the name of group 7?

  Halogens
• What is the name of group 8?

  Noble Gases
• What are features of alkali metals?

  • reacts rapidly with water
  • metals become more reactive as you go down the group
• What are features of alkaline earth metals?

  • less reactive than alkali metals
  • melting and boiling points are higher that alkali metals
• What are features of the halogens?


  • most reactive group of non-metals
  • gets less reactive down the group
• What are features of the noble gases?

  • very un reactive as they have a full outer energy level
• What are features of transition metals?

  • generally quite dense
  • form brightly coloured compounds
• What is the mass number?

  • number of protons and neutrons
  • is the top number
• What is a isotope?


  Atoms of the same element with different numbers of neutrons.
• What is an ion?

  If there is an imbalance of electrons and neutrons an ion is formed