¨ You will need your periodic table for these notes.

¨ Today you get to color in class!

The Periodic Table

The Periodic Table

I. History of the Periodic Table

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.

The Periodic Table

I. Organization¨Metallic Character

¨Rows & Columns

¨Table Sections

A. Metallic Character

1

2

3

4 5

6

7

¨ Metals ¨ Nonmetals¨ Metalloids

Use a marker to show the different characteristics of the table!

B. Table Sections

1

2

3

4 5

6

7

¨ Representative Elements¨ Transition Metals¨ Inner Transition Metals

Color your periodic table to show the different sections of the table!

B. Table Sections

1

2

3

4

5

6

7

Lanthanides - part of period 6

Actinides - part of period 7

Overall Configuration

C. Columns & Rows

1

2

3

4 5

6

7

¨ Group (Family)¨ Period

Show groups and periods on the table!

The Periodic Table

III. Periodic Trends¨Terms

¨Periodic Trends

¨Dot Diagrams

¨ Periodic Law

• Properties of elements repeat

periodically when the elements

are arranged by increasing

atomic number.

A. Terms

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

B. Periodic Trends

1

2

3

4 5

6

7

¨ Atomic Radius• Increases to the LEFT and DOWN.

Use a pen to show increasing atomic radius on the table!

B. Periodic Trends

1

2

3

4 5

6

7

¨ First Ionization Energy• Increases to the RIGHT and UP.

Use a pen to show increasing first ionization energy on the table!

B. Periodic Trends

¨ Which atom has the larger radius?

•Beor Ba

•Ca or Br

Ba

Ca

B. Periodic Trends

¨ Which atom has the higher 1st I.E.?

•N or Bi

•Baor Ne

N

Ne

B. Periodic Trends

¨ Group # = # of valence e- (except He)• Families have similar reactivity.

¨ Period # = # of energy levels

1

2

3

4 5

6

7

1

2 13 14 15 16 17

18

Use a pen to show the group and period numbers on the table!

3 4 5 6 7 8 9 10 11 12

C. Dot Diagrams

¨ Dots represent the valence e-.¨ EX: Sodium ¨ EX: Chlorine