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January 13, 2016

January 13, 2016. Today’s Schedule Q/A Correct Worksheet Start Periodic Table Coloring Periodic Table Pass back test Today you will need: Pen/Pencil Paper/ Notebook Pencil Crayons if you have them. Q/A.

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January 13, 2016

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  1. January 13, 2016 • Today’s Schedule • Q/A • Correct Worksheet • Start Periodic Table • Coloring Periodic Table • Pass back test • Today you will need: • Pen/Pencil • Paper/ Notebook • Pencil Crayons if you have them

  2. Q/A • Break down the following compound to its elements and how many atoms of each element are there. • 3 H2 (CrO4) 2

  3. 3 H2 (CrO4) 2 • Hydrogen= 3 X 2 = 6 atoms • Cromiun= 3 X 1 X 2 = 6 atoms • Oxygen= 3 X 4 X 2 = 24 atoms

  4. Add up the marks • 1 point for each correct element • Worksheet out of /25 • Bonus mark for having question 10 correct Put the mark clearly in the upper right hand corner.

  5. Counting atoms worksheet- Marks • NH4NO3 • Nitrogen= 2 atoms • Hydrogen= 4 atoms • Oxygen=3 atoms • S2F2 • Sulfur= 2 atoms • Fluorine=2 atoms • Na2CO3 • Sodium= 2 atoms • Carbon= 1 atom • Oxygen= 3 atoms • CaF2 • Calcium= 1 Atom • Fluorine= 2 Atoms • NO2 • Nitrogen= 1 atom • Oxygen= 2 atoms • Al2(SO4)3 • Aluminum= 2 atoms • Sulfur = 3 atoms • Oxygen =12 atoms

  6. Counting atoms Worksheet (Marks) • CH4 • Carbon= 1 atom • Hydrogen= 4 atoms • Al(C2H3O2)3 • Aluminum= 1 atom • Carbon= 6 atoms • Hydrogen= 9 atoms • Oxygen= 6 atoms • (NH4)2Cr2O7 • Nitrogen= 2 atoms • Hydrogen= 8 atoms • Chromium=2 atoms • Oxygen=7 atoms • 10) Bonus MARK! • Calcium= 1 atom • Oxygen= 8 atoms • Carbon= 18 atoms • Hydrogen= 14 atoms

  7. THE PERIODIC TABLE AN INTRODUCTION

  8. INVENTION OF THE PERIODIC TABLE • DMITRI MENDELEEV invented this table in order to organize the elements • Not only are they organized, they are organized in a way that explains and predicts their physical and chemical properties

  9. MENDELEEV • Russian scientist played solitaire with the 64 elements known at the time • He first arranged them in order of increasing atomic mass • When an element started to repeat properties he had seen before, he started a brand new row

  10. His table:

  11. Mendeleev’s Periodic Law • If the elements are arranged according to their atomic mass, a pattern can be seen in which similar properties occur regularly.

  12. Testing his Periodic Law • Mendeleev had predicted that elements would be discovered to fill in the empty spaces in his periodic table • His predictions were found to be accurate • A century later, it is still used to summarize chemical facts

  13. Mendeleev Video

  14. The Groups on the Periodic Table

  15. GROUPS OF ELEMENTS • A set of elements in the same column (running up and down) are called a CHEMICAL GROUP or FAMILY • These elements have similar physical and chemical properties • They form similar kinds of compounds when they combine with other elements

  16. Class Work • Use the handout to colour the different groups of the periodic table. • If you don’t have any pencil crayons, you may borrow mine. • If you borrow mine, put them back after you are finished!

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