Phizz heats some iron in air it reacts with oxygen to make iron oxide name the reactants and products in this reactions
Answers
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magnesium + oxygen → magnesium oxide
iron + oxygen → iron oxide
copper + oxygen → copper oxide
Which groups do magnesium, iron and copper come from?
In these reactions, the elements that react with oxygen are all metals. If you are not convinced of this, find them on the Periodic Table below in the front of your book. Can you see that they are all found in the region occupied by the metals? Where are metals located on the Periodic Table?
The names of the products of the three reactions above have something in common. Write down the names. Can you see what they have in common?
The products are all metal oxides. What exactly are metal oxides? As we will see later when we draw diagrams and write formulae to represent these reactions, they are compounds in which a metal is combined with oxygen, in some fixed ratio.
The metals will react similarly with the other elements in the same group as oxygen (group 16).
We are going to look at two of the reactions shown previously in greater detail in this chapter. Remember that they are not the only reactions of metals with oxygen; they are just the ones that have been chosen as examples.
First, we will observe the actual reactions. Your teacher will demonstrate, while you make observations. Afterwards we will write about these reactions using 'scientific language' as we write reaction equations for each one. Before we start, here is a reminder of something we discussed in Chapter 1.
THREE DIFFERENT LEVELS OF INTERPRETATION IN SCIENCE
In the first chapter of Gr. 9 Matter and Materials, we learnt that scientists interpret chemical reactions on three different levels. Those three levels are:
the macroscopic level;
the submicroscopic level; and
the symbolic level.
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