Just looking at the periodic table can be enough to give young science students a serious headache. But as you’ll soon find out, all those mysterious numbers and letters are clues to the amazing world of elements. The brainchild of Siberian superchemist Dimitri Mendeleev, the periodic table represents the 111 known elements, from hydrogen and oxygen to nobelium and lawrencium. But this doesn’t mean there are only 111 elements in the universe.
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