chem topic 2

• ionic bonding is bonding between what?


  metals and non metals
• metal atoms

  lose electrons
• non metal atoms

  gain electrons
• what is the reaction between non metals and metals in ionic bonding?

  electrostatic
• what is a metallic bond?


  electrostatic force of attraction between positive metal ions and delocalised electrons
• what are the layers like in alloys?


  distorted and can't slide easily
• boiling point of ionic compounds


  very high
• when are ionic compounds good conductors


  when dissolved in water
• when is bonding metallic bonding


  metals only
• metal ions are arranged in....


  layers in giat metal lattice
• giant metal lattices are...


  good conductors of heat and electricity, have high melting and boiling points and are easy to shape
• are metals dense


  yes
• are non metals dense


  no
• are metals malleable or brittle


  malleable
• are non metals malleable or brittle


  brittle
• each carbon atom is bonded to how many others in diamond?


  four
• each carbon atom is bonded to how many others in graphite?


  three
• silicon atoms are bonded to how many oxygen atoms?


  four
• are there free electrons in silica?


  no
• is silica insoluble?


  yes