Aim: To find out what happens when magnesium is heated in the presence of oxygen.

Background Information: Magnesium is an Alkaline Earth metal that has 12 protons, 12 neutrons and 12 electrons. Oxygen is a Non-metal that has 8 protons, 8 neutrons and 8 electrons.

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Heatproof mat

Clay pipe triangle

Crucible and lid

Bunsen burner


Safety Goggles


Weigh the crucible and lid then add Magnesium and weigh again.

Heat the crucible with the magnesium in it and place the lid on top.

Continue to heat at medium heat for five minutes whilst lifting the lid occasionally.

Record what happens then weigh the final product.



The magnesium strip got heavier when it was heated up this is because of the oxygen combining with the magnesium to create magnesium oxide.

What happened and how do you know something happened?

Explain the chemistry that’s happening

Link the results back to the hypothesis- especially any surprises

How did you/could you make it accurate, safe and fair


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