The natural world as we know it is composed of 117 elements. Some of these elements we are very familiar with, e.g. oxygen, gold, carbon. Some we have never heard of -- meitnerium, darmstadtium and ununquadium.Some elements occur naturally and are all around us. Nitrogen, for example, comprises about 75% of the air we breathe. Some we can only create for millionths of a second by smashing atoms
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