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Matter, Elements, Molecules, and Compounds - Monadnock Regional High School

Matter, Elements, Molecules, and Compounds By Cindy Grigg 1 What is matter? Matter is the stuff that makes up everything in the universe. Matter has mass and takes up space. Matter is made of atoms. Solids, liquids, gases, and plasma are all matter. When all atoms that make up a substance are the same, then that substance is an element.