1. I. History of the Periodic Table (p.284-285) Mendeleev Mosely
Ch The Periodic Table
I. History of the Periodic Table
(p )
Mendeleev
Mosely

2. A. Dmitri Mendeleev Dmitri Mendeleev (1869, Russian)
Organized elements by increasing atomic mass.
Predicted the existence of undiscovered elements.

3. B. Henry Mosely Henry Mosely (1913, British)
Organized elements by increasing atomic number.
Fixed problems in Mendeleev’s arrangement.

4. Ch. 10 - The Periodic Table II. Organization (p.286-291)
Metallic Character
Rows & Columns
Table Sections

5. A. Metallic Character
Metals
Nonmetals
Metalloids

6. B. Table Sections Representative Elements Transition Metals
Inner Transition Metals

7. B. Table Sections Overall Configuration Lanthanides - part of period 6
Actinides - part of period 7

8. C. Columns & Rows
Group (Family)
Period

9. III. Periodic Trends (p.288-291) Terms Periodic Trends Dot Diagrams
Ch The Periodic Table
III. Periodic Trends (p )
Terms
Periodic Trends
Dot Diagrams

10. A. Terms
Periodic Law
Properties of elements repeat periodically when the elements are arranged by increasing atomic number.

11. A. Terms Valence Electrons e- in the outermost energy level
Atomic Radius
First Ionization Energy
energy required to remove an e- from a neutral atom

12. B. Periodic Trends
Atomic Radius
Increases to the LEFT and DOWN.

13. B. Periodic Trends First Ionization Energy
Increases to the RIGHT and UP.

14. Be or Ba Ca or Br Ba Ca B. Periodic Trends
Which atom has the larger radius?
Be or Ba
Ca or Br Ba Ca

15. N or Bi Ba or Ne N Ne B. Periodic Trends
Which atom has the higher 1st I.E.?
N or Bi
Ba or Ne N Ne

16. B. Periodic Trends Group # = # of valence e- (except He)
Families have similar reactivity.
Period # = # of energy levels 1A 2A
3A 4A 5A 6A 7A 8A

17. C. Dot Diagrams
Dots represent the valence e-.
EX: Sodium
EX: Chlorine