Compounds and molecules and latin symbols
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Compounds and Molecules (and Latin Symbols). What are they???. 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.

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Compounds and Molecules (and Latin Symbols)

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Compounds and molecules and latin symbols

Compounds and Molecules(and Latin Symbols)

What are they???


Compounds

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.


Compounds and molecules and latin symbols

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.


Compounds and molecules and latin symbols

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………


Compounds and molecules and latin symbols

Ba-BOOM!

Oh! The Humanity!


Compounds and molecules and latin symbols

Now, you know that explosions are cool when….

(well, maybe not THIS explosion)


Compounds and molecules and latin symbols

They

Have

Their

Own

STAMPS

Here’s a postcard that survived the explosion


Compounds and molecules and latin symbols

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


Compounds and molecules and latin symbols

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.


Compounds and molecules and latin symbols

Science TV

Periodic Table - Compounds


Compounds and molecules and latin symbols

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 H2O you have H2O2.

Do you know what that is????


Compounds and molecules and latin symbols

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:

C9H8O4

carbon – 9 atoms

hydrogen – 8 atoms

oxygen – 4 atoms

Aspirin is made up of three different elements and a total of 21 atoms.


Compounds and molecules and latin symbols

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. H2O

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.

Cut the amount in half

H

O

2


Compounds and molecules and latin symbols

Your blood contains a compound called hemoglobin. Look at hemoglobin’s chemical formula:

C3032H4816O870N780S8Fe4

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).


Compounds and molecules and latin symbols

Science TV

Periodic Table - Molecules


Questions

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 H2O unit is one molecule


Element symbols

Element symbols

Some elements have symbols that don’t make sense…

….like the symbol for iron is Fe.

Where does that come from???


Compounds and molecules and latin symbols

Answer: Latin language

You see….back in the early days Latin

was the language of the intellectual

people in Europe.


Part 2 element symbols the weird ones

Part 2Element SymbolsThe Weird Ones…


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Part 2Element SymbolsThe Weird Ones…


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Part 2Element SymbolsThe Weird Ones…


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