Chemistry

• Isotopes


  • Particles have the same chemical behaviour
  • But they have a difference in mass
  • Not all elements have an isotope
• Neutron losing neutrality


  Becomes an ion
• Groups


  • Group 1: Alkaline earth metals
  • Group 2: Earth metals
  • Group 7: Diatomic halogens
  • Group 8: Monoatomic inert/noble gases
• From group 3 cutting across to group 7 are all metals
• All metals donate electrons
• Transition elements form more than 1 ion
• Ionic bonding is between a metal and non-metal
• Metallic bonding includes a se of free moving electrons which are attracted to positive ions
• Delocalized electrons are free to move
• 0-7 is positive

  7-14 is negative
• When group 1 elements react it forms an alkaline
• Whenever a metal reacts with an acid, a salt is formed