II. COMPOSITION OF MATTER

II. COMPOSITION OF MATTER

1. PURE SUBSTANCE

   • HOMOGENEOUS CANNOT BE BROKEN DOWN BY PHYSICAL MEANS FIXED COMPOSITION AND DEFINITE PROPERTIES
   • ELEMENT
     • ONE TYPE OF ATOM CANNOT BE DECOMPOSED BY PHYSICAL OR CHEMICAL METHOD
   • COMPOUND
     • 2 OR MORE ELEMENTS COMBINED IN DEFINITE PROPORTIONS CAN BE SEPERATED BY CHEMICAL METHODS

2. MIXTURE

   • CAN BE PHYSICALLY SEPERATED
   • COMBINATION OF 2 OR MORE SUBSTANCES IN VARIABLE PROPORTIONS EACH SUBSTANCE RETAIN ITS OWN CHEMICAL IDENTITY CAN BE SEPARATED INTO ITS COMPONENTS BY PHYSICAL METHIDS
   • HOMOGENEOUS
     • UNIFORM COMPOSITION
     • SOLUTIONS UNIFORM COMPOSITION AND PROPERTIES THROUGHOUT A GIVEN SAMPLE, BUT MAY VARY FROM ONE SAMPLE TO THE OTHER. (ALL DISSOLVED SOLUTIONS ARE THE ONLY PART OF THE HOMOGENEOUS MIXTURE)
   • HETEROGENEOUS
     • NON-UNIFORM PROPERTIES THROUGHOUT A SAMPLE COMPONENT RETAIN THEIR IDENTITY AND PHASE BOUNDARIES EXIST