Answer:
Caesium, the most reactive metal in the periodic table, reacts extremely violently – hence why it can't be demonstrated in a classroom! This can be compared to other common metals, such as iron and copper, which produce no reaction when dropped into water.
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Petroleum products<span> are materials derived from crude oil</span><span> as it is processed.
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Answer:
diffraction
Explanation:
the correct answer is diffraction
