1. COMPOSITION OF MATTER Pure Elements Pure Compounds
Mixtures of Elements and/or Compounds

2. ELEMENTS & COMPOUNDS
ELEMENT Cannot be decomposed into 2 or more simpler substances by ordinary chemical or physical means (requires Nuclear process)
COMPOUND Contains 2 or more chemical elements combined in FIXED PROPORTIONS

3. ELEMENTS, COMPOUNDS & MIXTURES

4. LAW OF CONSERVATION OF MASS
Mass is neither created or destroyed in a Chemical change

5. LAW OF DEFINITE PROPORTIONS
In given Chemical Compound, proportions by mass of elements are fixed, irrespective of how the compound was made, or its source of origin

6. DALTON’S ATOMIC THEORY OF MATTER
1. Solid Indivisible Atoms
2. All Atoms of Same Element Identical in All Respects
3. Atoms of Different Elements Have Different Masses
4. Atoms Indestructible in Chemical Reactions
5. Compounds formed from Elements in Small, Whole Number Ratios

7. AVOGADRO’S NUMBER
N = x 1023

8. AVOGADRO’S NUMBER
One Mole of Substance contains Avogadro’s Number of Species (e.g. Atoms, Molecules, peanuts, whales)

9. MOLAR MASS Mass of 1 Mole of Atoms of Element
E.g. For H = g mol-1
For O = g mol-1

10. MASS SPECTROMETER
Separates ions by mass/charge ratio.