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INTRODUCTION In 1869 a Russian scientist

named Dmitri Mendeleyev constructed 1st periodic table.

He organized the elements according to their properties.

An elements position on the table tells us a lot about the element!

ORGANIZING THE ELEMENTS

Periods – the horizontal rows on the periodic table

• There are seven periods

• The lanthanides and actinides fit in with the sixth and seventh periods

ORGANIZING THE ELEMENTS

Families/ Groups - the vertical columns on the periodic table

•Elements have similar properties•Usually react the same in chemical reactions•May look the same and be used for the same purposes•Each family is numbered and has a name

ORGANIZING THE ELEMENTS

Metals, Nonmetals and Metalloids

All elements to the left of the “stair step” are metals

They are good conductorsThey have a shiny, metallic luster

They are malleable and ductile

ORGANIZING THE ELEMENTS

All elements to the right of the “stair step” are called nonmetals.

They are poor conductors They usually have a dull or

earthy luster When pounded, nonmetals

usually shatter or form powders

ORGANIZING THE ELEMENTS

The elements that touch the bold step-shaped line are called metalloids.

These elements have characteristics of both metals and nonmetals

There are eight of them: B, Si

Ge, As, Sb, Te, Po, At

CLASS WORK/HOME WORK

Read through chapter 6.1 and write out a list of characteristics for the following families:

1.Alkali Metals (Name the elements included in these)

2.Alkaline Earth metals (Name the elements included in this family)

3.Transition metals

4.Lanthanide series and actinide series

5.Halogens (Name the elements included in these)

6.Nobel gases (Name the elements included in these)