Chemistry: Topic 1

Chemistry: Topic 1

1. Structure of an atom

   • Nucleus
     • Protons
       • Positive charge
         • Atomic no.
     • Nuetrons
       • No charge
   • Shells
     • Electrons
       • Negitive charge
   • Mass
     • Atomic no
       • No. of protons
     • Atomic mass
       • No. of protons and nuetrons
   • No charge
     • Same amount of protons and nuetrons

2. Modern periodic table

   • Right side
     • Non-metals
   • Left side
     • Metals
   • Periods
     • Horizontail rows
   • Groups
     • Similar properties
   • Middle
     • Metals

3. Electron shells

   • inner shell
     • 2 electrons max
   • Middle shells
     • 8 electrons max
   • Outer shell
     • 8 electrons max
   • Electronic configuration
     • 2, 8, 7
       • First, Middle, outer
   • Group no.
     • Amount of electrons in the outer shell
   • Period no.
     • No. of shells

4. Ions

   • Cations
     • Postive ions
     • Has lost electrons
   • Anions
     • Negitive ions
     • Has gained electrons