1. The Periodic Table
of elements

2. ELEMENT SONG

3. Elements in Earth’s Crust

4. What are people made of?

5. Mendeleev- First Periodic Table ( 1869)
Grouped by atomic mass & chemical properties. 
Blank spaces were left to add predicted elements
Even attempted to name undiscovered elements
Father of the periodic table

6. Mendeleev’s Periodic Table

7. Mosley 1914- Modern P.T. Arrange by Atomic #
Similar property elements ended up next to each other
Periodic Law

8. Periodic Law
When elements are arranged by increasing atomic number their chemical properties show a periodic (repeating) pattern

9. Modern Periodic Table

10. Elements are arranged:
Vertically into Groups or Families
2 Common ways to arrange groups:
IUPAC- numbers them 1-18
American- Numbers the s & p blocks 1A- 8A and the d block 1-10B
Horizontally Into Periods (1-7)

12. Why?

13. If you looked at an atom of each element in a group, you would see…

14. Same # valence electrons.

15. All atoms in group 2 have 2 electrons in their outer shells
Be (Beryllium)
Atom
Mg (Magnesium) Atom

16. If you looked at an atom from each element in a period
you would see…

17. All atoms in Period 4 have 4 Energy Levels
4th Shell
K (Potassium)
Atom
Kr (Krypton)
Atom
Fe (Iron) Atom

18. Shells
Another name for energy level
Each period starts a new shell

19. Periodic Patterns
Element’s chemical behavior is determined by: its e- config

20. Each Group has distinct properties

21. Alkali Metals Group 1 1 valence e-: s1 Soft, Clay like, & silver color
Most reactive metals
Reacts violently with H2O
Always bonded with another element.

22. Hydrogen
Sits atop Group 1, but it is not a member (b/c it has 1 valence e-)
It’s in a class of its own
It’s a gas at room temperature.

23. Alkaline Earth Metals Group 2 2 valence e-: s2 Silver-white color
Fairly reactive
Always bonded with another element.
Found in rocks/ earth’s crust

25. How many things can you think of that have Transition Metals in them?

28. Halogens Group 7A or 17 7 valence electrons s2 p5
Most active non-metals.
Never found free in nature
Poisonous

29. Noble Gases Group 8A or 18 Very stable 8 valence electrons s2p6
Colorless gases
Un reactive (inert)
room
temp

31. Properties of Metals 2. Luster= shiny.
1. Conductors of heat and electricity
2. Luster= shiny.
3. Ductile= stretched into thin wires
4. Malleable= bendy, pounded into thin sheets
5. All solids except mercury (Hg)
at room temp.
6. Most are grey/silver in color

32. Properties of Metalloids/Semi-metals
Metalloids :metal-like
Can be shiny or dull
Conduct heat/electricity better than non-metals but not as well as metals.
They are ductile and malleable.

33. What are metalloids used for?

35. Properties of Non-Metals
Not: ductile, malleable, shiny, or conductor (Insulator)
Brittle and break easily
Solids, liquids & gas
More colorful
Yellow-S, red-Br,
Green- Cl

39. Element Game