The structure of the atom

1. anything that has mass and occupies space
   1. element

      Nota:

      • consists of only one type of atom
      1. atom

         Nota:

         • smallest particle of an element that can participate in a chemical reaction 
      2. molecule

         Nota:

         • group of two or more atoms which are chemically bonded together
   2. compound

      Nota:

      • substance that contains two or more elements that are chemically bonded together
      1. molecule
      2. ions

         Nota:

         • positively or negatively charged particles
2. diffusion

   Nota:

   • movement of substances from high concentrated region to low concentrated region 
   1. experiment diffusion
3. kinetic theory
4. changes of state of matter
   1. experient naphthelene

1. history development

   Nota:

   • DaTuk Rambut Botak Cacat
2. subatomic particles
   1. protons
   2. neutrons
   3. electrons
3. proton number and nucleon number

   Nota:

   • 1. proton number = number of protons
   1. proton number

      Nota:

      • of an element is the number of proton in its atom
   2. nucleon number

      Nota:

      • of an element is the total number of protons and neutrons in it's atom

Nota:

• are atoms of the same element with the same number of protons but different number of neutrons 

1. examples
2. uses

   Nota:

   • rujuk buku

1. valence electron

   Nota:

   • electron found in the outermost occupied shell of an atom