2. Compounds and Molecules (and Latin Symbols) What are they???

3. Compounds O.K. – you now know that there are over 100 different elements on the periodic table. Most elements can join together chemically to form a brand new thing. This “thing” is called a compound.

4. Think of it like this…. There are 26 letters in the alphabet. These letters can be combined to form words. Compounds are like words. Different combinations of letters give you different words. Different combinations of elements give you different compounds.

5. Take this example…. Hydrogen (H), a gas, is the lightest element. It was used in the pride of the Nazi airships, the Hindenburg. Only one problem with hydrogen………

6. Ba-BOOM! Oh! The Humanity!

7. Now, you know that explosions are cool when…. (well, maybe not THIS explosion)

8. They Have Their Own STAMPS Here’s a postcard that survived the explosion

9. O.K., now take oxygen … you know it’s a gas – one that you breathe in every day.

10. Combine these two gases in a 2:1 ratio and what do you get……. WATER – a liquid Question: You mean when two gases combine chemically they make a liquid??? Answer: Yup.

11. Science TV Periodic Table - Compounds

12. So, the elements oxygen and hydrogen combined in a specific way gives you the compound water. Let’s say you add one more oxygen atom to the mix. Instead of H 2 O you have H 2 O 2. Do you know what that is????

13. Just think of how many different compounds can form from over 100 different elements….. Just about everything you see, touch, smell, eat, etc……… is made of compounds. Take aspirin, for example…….here is it’s formula: C 9 H 8 O 4 carbon – 9 atoms hydrogen – 8 atoms oxygen – 4 atoms Aspirin is made up of three different elements and a total of 21 atoms.

14. If you keep cutting the water in half will there be a point that if you cut one more time you do not have water? YES! That smallest piece of water is called a molecule. Now a molecule is the smallest part of a compound that still keeps the properties of that compound. Here’s an example - We’ll stay with water. H 2 O Cut the amount in half

15. Your blood contains a compound called hemoglobin. Look at hemoglobin’s chemical formula: C 3032 H 4816 O 870 N 780 S 8 Fe 4 That’s 6 different elements for a total of 9512 atoms! One hemoglobin molecule is exactly that size – no more…no less (of course in your blood you have many of those molecules).

16. Science TV Periodic Table - Molecules

17. Questions… Is a molecule always a compound? No - A single atom of gold could be considered one molecule Can an element be a molecule? Yes – see above answer Is a compound always a molecule? Yes – one individual H 2 O unit is one molecule

18. Element symbols Some elements have symbols that don’t make sense… ….like the symbol for iron is Fe. Where does that come from???

19. Answer: Latin language You see….back in the early days Latin was the language of the intellectual people in Europe.

20. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatrium PotassiumKalium IronFerrum CopperCuprum SilverArgentum TinStannum TungstenWolfram GoldAurum MercuryHydragyrum LeadPlumbum

21. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKalium IronFerrum CopperCuprum SilverArgentum TinStannum TungstenWolfram GoldAurum MercuryHydragyrum LeadPlumbum

22. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrum CopperCuprum SilverArgentum TinStannum TungstenWolfram GoldAurum MercuryHydragyrum LeadPlumbum

23. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrumFe CopperCuprum SilverArgentum TinStannum TungstenWolfram GoldAurum MercuryHydragyrum LeadPlumbum

24. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrumFe CopperCuprumCu SilverArgentum TinStannum TungstenWolfram GoldAurum MercuryHydragyrum LeadPlumbum

25. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrumFe CopperCuprumCu SilverArgentumAg TinStannum TungstenWolfram GoldAurum MercuryHydragyrum LeadPlumbum

26. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrumFe CopperCuprumCu SilverArgentumAg TinStannumSn TungstenWolfram GoldAurum MercuryHydragyrum LeadPlumbum

27. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrumFe CopperCuprumCu SilverArgentumAg TinStannumSn TungstenWolframW GoldAurum MercuryHydragyrum LeadPlumbum

28. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrumFe CopperCuprumCu SilverArgentumAg TinStannumSn TungstenWolframW GoldAurumAu MercuryHydragyrum LeadPlumbum

29. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrumFe CopperCuprumCu SilverArgentumAg TinStannumSn TungstenWolframW GoldAurumAu MercuryHydragyrumHg LeadPlumbum

30. Part 2 Element Symbols The Weird Ones… Element NameLatin NameSymbol SodiumNatriumNa PotassiumKaliumK IronFerrumFe CopperCuprumCu SilverArgentumAg TinStannumSn TungstenWolframW GoldAurumAu MercuryHydragyrumHg LeadPlumbumPb