1. Ch. 6: The Periodic Table of Elements

2. Essential Questions
What information does the Periodic Table provide about atoms?
Why are the elements arranged in the way that they are?
What are the trends of the elements of the PTE?

3. Mendeleev’s PTE

4. The genius of Mendeleev’s periodic table Lou Serico

5. Henry Moseley In 1913, Henry Moseley discovered atomic numbers
Previously, elements were organized mostly by their masses (though Mendeleev went mostly by mass, he adjusted here and there to fit properties)

6. Periodic Law
Elements are arranged in order of increasing atomic number.
There is a periodic repetition of physical and chemical properties.

7. Periods and Groups

8. Blocks of Elements

9. Metals, Non-Metals & Metalloids

10. Metals, Non-Metals & Metalloids Properties
Metals – generally good conductors of heat and electricity
Non metals are poor conductors
Metalloids are somewhere in between (sometimes they behave like a metal, sometimes they behave like a nonmetal)

11. Metals, Non-Metals & Metalloids Properties
Metals – have high melting and boiling points
Non metals – have low melting and boiling points
Metalloids – low melting points, high boiling points

12. Melting and Boiling Point
Temperature in Celsius where there is a phase change from solid to liquid and then from liquid to gas.

13. Organizing by Groups What is the electron configuration for Li?
What about Na? K?
Rb?
Notice something?

14. Groups of the PTE

15. Solving the puzzle of the periodic table Eric Rosado

16. Properties of Elements
Reactivity
Atomic Radius
Melting and Boiling Point
Ionization Energy
Electronegativity
Density

17. Reactivity Metals get more reactive down a group
Non metals get less reactive down a group

18. Reactivity You Try What is the most reactive Halogen?
What is the least reactive Alkali metal?

19. Atomic Radius
The radius of one atom of an element.

21. Atomic Radius You Try What is the largest Noble Gas?
What is the smallest Alkaline Earth Metal?
Rank by atomic size: Ba, Ca, Zn, Se, O

22. Ionization Energy
The energy (quanta) needed to remove an electron from a neutral atom.
Neutral-same number of protons and electrons.

23. Why?

24. Ionization Energy You Try
What Halogen has the largest Ionization energy?
What Noble gas has the smallest Ionization energy?
What Period 2 element has the smallest ionization energy?

25. Electronegativity
The ability of an atom to attract electrons when the atom is in a compound.
Important for bonding with other atoms.

27. Electronegativity You Try
What alkali metal has the largest electronegativity?
What transition metal most likely has the lowest electronegativity?
Rank from largest to smallest electronegativity: Ga, O, P, Ge, N, Si, F

28. Periodic Trends Activity
You will research the properties of different elements.
You will organize them in excel, graph them, insert the graphs into a word document, and complete the questions about the trends of each property.