Topic 1 - Atomic Structure

Topic 1 - Atomic Structure

1. Atoms

   • Protons
   • Neutrons
   • Electrons
   • Atomic Number = Number of Protons
   • Mass Number = Total Number of P + N

2. Elements

   • Substance made up of all the same atoms.
   • Isotopes different form of element extra neutrons.

3. Compounds

   • Elements mixed together are compounds.

4. Separation Techniques

   • Chromatography
   • Filtration
   • Evaporation
   • Crystallisation
   • Distillation

5. History of The Atom

6. Electronic Structure

   • Shells

7. Development of the Periodic Table

   • Was arranged by Atomic Mass.
   • Mendeleev left gaps and predicted new elements.

8. Modern Periodic Table

   • Ordered by Increasing Atomic Number.
   • Vertical Columns = Groups
   • Rows = Periods
   • Group Number = Number of Electrons in outer shell.
   • Elements with similar properties form columns.