1. Elements make compounds Substances Miss Doig

2. Explosive experiment Goggles, bench mat, tongs, bunsen, lighter and magnesium. CAREFULLY put magnesium in flame.

3. What energy is being released? -When magnesium is burned, energy is released as light. Is there a new substance being formed? -A new substance forms, it is white. Is this new substance lighter or heavier? -This new substance is heavier as there are two different elements in the substance, they are magnesium and oxygen. Making a compound

4. Elements make compounds When elements join to make a compound, energy is released and a new substance is formed. A word which means ‘energy released’ is exothermic. What do you think endothermic means?

5. Naming Compounds Substances

6. Elements and symbols that you should know: 1)Hydrogen 2)Helium 3)Lithium 4)Beryllium 5)Boron 6)Carbon 7)Nitrogen 8)Oxygen 9)Fluorine 10)Neon 11)Magnesium 12)Aluminium 13)Silicon 14)Phosphorus H He Li Be B C N O F Ne Mg Al Si P

7. If two identical elements combine then the name doesn’t change..e.g. oxygen + oxygen  oxygen This happens with the following elements: 1)H 2 2)N 2 3)O 2 These elements always go around in pairs. For example, hydrogen looks like this:

8. 1)Sodium + chlorine 2)Magnesium + fluorine When two elements join the name ends with ____ide e.g. Magnesium + oxygen magnesium oxide

9. When three or more elements combine and one of them is oxygen the ending is _____ite or ________ ate e.g. Copper + sulphur + oxygen Copper sulphate 1)Calcium + carbon + oxygen 2)Potassium + carbon + oxygen 3)Sodium + sulphur + oxygen

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