compound - a substance composed of two or more elements whose atoms are bonded in a specific ratio, dissolve - to break a substance (solute) into tiny particles when surrounded by another substance's (solvent) particles to form a solution, element - a substance made of only one type of atom, heterogeneous mixture - a mixture that does not have a uniform composition, homogeneous mixture - a mixture that has a uniform composition; it’s also known as a solution, matter - anything that has mass and takes up space, physical property - any characteristic of matter that can be observed or measured without a change in its chemical composition, pure substance - matter made of only one type of particle: an element or a compound, solution - mixture that has a uniform composition; it's also known as a homogeneous mixture,

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