1. Matter Anything that has mass and takes up space MixturesSubstances Combo of pure substances; each substance maintains chemical properties Matter with uniform and unchanging composition HeterogeneousHomogeneous Not uniform -Sand & water -pizza solutions Constant composition salt water koolaid ElementsCompounds Pure substances that cannot be separated into simpler substances Combo of 2 or more elements that are chemically combined -H 2 O

2. How to separate mixtures FiltrationDistillationCrystallizationChromato- graphy Seperation based on particle size Sand & water Separation based on boiling points; good for homo- geneous mixtures Kool-Aid Formation of solid particles from a solution Rock candy Separation based on particle size Ink

3. The Periodic Table Organized by number of protons Atoms are composed of –Protons Positive charge Found in nucleus (center of atom) –Neutrons Neutral charge (no charge) Found in nucleus (center of atom) –Electrons Negative charge Found outside of the nucleus Atomic Number = protons Atomic Mass = protons + neutrons –Neutrons = atomic mass – atomic number

5. Periods = rows Groups/Families = columns

6. Alkali Metals Alkaline Earth Metals Transition Metals Metalloids Non-metals Halogens Noble Gases Lanthanides Actinides