metals

• How do transition metals compare in reactivity to metals in groups one and two?

  They are generally less reactive
• What do noble gases have that makes them unreactive?

  A full outer energy level
• What happens when metals react?

  They lose electrons to achieve stability
• What electronic structure do metals achieve when they react?

  Same as a noble gas
• How many protons and electrons does a lithium atom have?

  Three protons and three electrons
• What happens to lithium when it reacts?

  It loses one outer electron
• What does aluminium do when it reacts?

  It loses three outer electrons
• What happens to the charge of lithium when it loses an electron?

  It becomes a lithium ion with a positive charge
• What does a barium atom do when it reacts?

  It loses two outer electrons
• What overall charge does a barium ion have?

  Two positive charges