Topic C1 - Atomic Structure and the Periodic Table

Topic C1 - Atomic Structure and the Periodic Table

1. Atoms - All substances are made of atoms.

   • They contain three subcellular structures one of these is Electrons
     • 1) Move around the nucleus in electron shells
     • 3) They're negatively charged and tiny, but cover a lot of space
     • 2) The volume of their orbits determines the size of the atom
     • 4) Electrons have virtually no mass
   • They also have a nucleus which contains the subcellular structures protons and neutrons
     • 1) It's in the middle of the atom
       • 2) It contains protons and neutrons
         • 3) The nucleus has a radius of around 1/10,000
           • 4) It has a positive change because of the protons
             • 5) Almost the whole mass of the atom is concentrated in the nucleus