Transcript Periodic Table - mrsj.exofire.net

Ch. 10 - The Periodic Table
I. History of the Periodic Table
(p.284-285)
Mendeleev
Mosely
A. Dmitri Mendeleev
 Dmitri Mendeleev (1869, Russian)
• Organized elements by
increasing atomic mass.
• Predicted the existence of
undiscovered elements.
B. Henry Mosely
 Henry Mosely (1913, British)
• Organized elements by
increasing atomic number.
• Fixed problems in Mendeleev’s
arrangement.
Ch. 10 - The Periodic Table
II. Organization (p.286-291)
Metallic Character
Rows & Columns
Table Sections
A. Metallic Character
1
2
3
4
5
6
7
 Metals
 Nonmetals
 Metalloids
B. Table Sections
1
2
3
4
5
6
7
 Representative Elements
 Transition Metals
 Inner Transition Metals
B. Table Sections
1
2
3
4
5
6
7
Overall Configuration
Lanthanides - part of period 6
Actinides - part of period 7
C. Columns & Rows
1
2
3
4
5
6
7
 Group (Family)
 Period
Ch. 10 - The Periodic Table
III. Periodic Trends (p.288-291)
Terms
Periodic Trends
Dot Diagrams
A. Terms
 Periodic Law
• Properties of elements repeat
periodically when the elements
are arranged by increasing
atomic number.
A. Terms
 Valence Electrons
• e- in the outermost energy level
 Atomic Radius
 First Ionization Energy
• energy required to remove an efrom a neutral atom
B. Periodic Trends
 Atomic Radius
• Increases to the LEFT and DOWN.
1
2
3
4
5
6
7
B. Periodic Trends
 First Ionization Energy
• Increases to the RIGHT and UP.
1
2
3
4
5
6
7
B. Periodic Trends
 Which atom has the larger radius?
•Be or Ba
Ba
•Ca or Br
Ca
B. Periodic Trends
 Which atom has the higher 1st I.E.?
•N or Bi
N
•Ba or Ne
Ne
B. Periodic Trends
 Group # = # of valence e- (except He)
• Families have similar reactivity.
 Period # = # of energy levels
1A
1
2
3
4
5
6
7
8A
2A
3A 4A 5A 6A 7A
C. Dot Diagrams
 Dots represent the valence e-.
 EX: Sodium
 EX: Chlorine