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Question

Write a word equation for the reaction of magnesium with oxygen.

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Solution

2Mg(s)+O2(g)2MgO

Explanation:

First, we need to identify the type of bond and reaction. This is an ionic bond so atoms are giving and accepting electrons. This is a synthesis reaction.

Magnesium has a charge of 2+, while oxygen has a charge of 2−. The burning of magnesium metal reacts with oxygen found in the air (oxygen gas) to form magnesium oxide.

2Mg(s)+O2(g)2MgO

Oxygen is a diatomic molecule and is almost always reacting with elements as a gas, O2 .

Here is a short video showing the reaction of magnesium and oxygen. The white ash and smoke formed in the reaction is the magnesium oxide.


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