Periodic Table

SymbolsElement Symbol Number

Oxygen O

Chromium Cr

Sodium Na

Lead Pb

Iron Fe

Tungsten W

Potassium K

The Table

• Increase in Atomic Number

3 4

11

105

89

33

19

1814

Notice how the first few start a new row every 8 atoms

Groups

• All in the same group have the same properties

Group 1

Alkali

Metals

Very reactive

Groups

• All in the same group have the same properties

Group 2

Alkali

Earth

Metals

Less reactive

Groups

• All in the same group have the same properties

Group 7

Halogens

Poisonous Gases

Cleans Water

Groups

• All in the same group have the same properties

Group 8

Noble Gases

Non-reactive

Glow with electricity

Groups• All elements in the same group have

the same propertiesGroup 8

Noble Gases

Non-reactive

Glow with electricity

Group 7

Halogens

Poisonous Gases

Cleans Water

Group 2

Alkali

Earth

Metals

Less reactiveGroup 1

Alkali

Metals

Very reactive

Properties of MetalsNon-metals are mostly gases and liquids and most do not conduct electricity. Dull and brittle.

Metals are mostly Solids and conduct electricity. Shiny and hard. Mix 2 together and form an ALLOY.

Alloys

• Two metals mixed together• Some of both properties• Brass – Copper and Zinc• Bronze – Copper and Tin• Stainless Steel – Chromium and Iron

(and carbon)

Extraction

• Removing metal from it’s ORE

A lot of history is decided by getting Metals from stones

Conduction• All metals conduct

electricity

Moving electrons carry the charge

Metals conduct electricity

The Light bulb shows electrons flow

Non-metals are insulators

No flow of electrons

Summary

• Groups• Metals and non-metals

H/W

• P 188• Q 1 to 6