1. Bienvenidos Científicos! Today: 1.Correct IV/DV/Constants practice (white handout) 2.Go over States of Matter Simulation (blue handout) 3.Complete Chemistry Basics Mind- Map

2. PROPERTIE S PHYSICAL CHEMICAL COLOR CRYSTAL STRUCTURE LUSTER (how shiny or dull) MELTING/BOILING POINT DENSITY MALLEABILITY SOLUBILITY HARDNESS FLAMMABILITY REACTION TO HEAT TOXICITY REACTIVITY (with other elements)

3. ELEMENTS Pure substances that can’t be separated Made of ELECTRON CLOUD NUCLEUS zero ELECTRONS negative charge PROTONS positive charge NEUTRONS NO charge total charge protons = electrons

4. ELEMENTS

5. Are organized in the Periodic Table based on their properties and structure.

6. PERIOD GROUP or Family PERIODIC TABLE

7. Ne 10 Atomic Mass Atomic Number 20.1797 Average number of protons + neutrons vary stay the same If the symbol is two letters, capitalize only the first Number of protons

8. Practice Atomic Number = Atomic Mass = Number of Protons= (same as Atomic #) Number of Electrons = (same as # of protons) Number of Neutrons = (Atomic mass – atomic number, then rounded to the nearest whole number ) Ca 20 40.078 20 40.078 20 40.078 – 20 = 20.078 ≈ 20