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Elements and Compounds

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by

Pip Baggins

on 4 May 2014

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Transcript of Elements and Compounds

Physical State
-Solid
-Liquid
-Gas

Compositions
-Element
-Compound
-Mixture
-Cannot be broken down into different subtances
-pure substances whose atoms are all the same


What does H stand for?
What does O stand for?
Elements
-are composed of two or more elements
- contain two or more types of atom
Compounds
Elements and Compounds
Textbook page 213
Check - question 4
Challenge - question 4
Homework
How do we write the formula?
Water - each molecule of water contains two atoms of hydrogen and one atom of oxygen. It's a ratio!
What does H
2
O mean?
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