substances that are the building blocks of all matter, made up of one kind of atom

smallest particle of a substance that still has the properties of that substance

one- or two- letter code that stands for an element

tells the kinds of atoms and how many of each kind are in a compound or molecule

an arrangement of elements in order of their atomic numbers

substance made up of two or more elements chemically combined

force of attraction that holds together the atoms in a compound

The smallest unit of an element that has all of the properties of that element

The process of correctly throwing away or getting rid of something

recovering items that would have been thrown away and finding another use for them

materials converted into new products

the wise use and protection of natural resources

The curved upper surface of a liquid column

Material Safety Data Sheet, a form with data regarding the properties of a particular substance

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