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Periodic Table. Symbols. The Table. Increase in Atomic Number. 3. 4. 5. 10. 11. 14. 18. 19. 33. 89. 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.
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The Table • Increase in Atomic Number 3 4 5 10 11 14 18 19 33 89
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 properties Group 8 Noble Gases Non-reactive Glow with electricity Group 2 Alkali Earth Metals Less reactive Group 7 Halogens Poisonous Gases Cleans Water Group 1 Alkali Metals Very reactive
Properties of Metals Non-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