This means that their magnetism is there all the time and cannot be turned on or off as it can with an electromagnet. Converting a magnet to a non-magnet is called demagnetisation. Magnets are made ...
Half-fill separate test-tubes with copper(II) sulfate, iron(II) sulfate and zinc sulfate solutions. Add a piece of magnesium to each test-tube. Leave for 3 minutes, record observations.
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