product		a substance made up of atoms of two or more different elements joined by chemical bonds
heterogeneous		a substance that cannot be separated or broken down into simpler substances by chemical means
physical property		a ratio that is derived from the equality of two different units
molecule		a quantity adopted as a standard of measurement
homogeneous		the process by which one or more substances change to produce oneor more different substances
mass		can consist of one atom or two or more atoms bonded together
quantity		a measure of the amount of matter in an object
density		a substance or molecule that participates in a chemical reaction
chemical		describes something that has a uniform structure or compostition throughout
compound		a property of matter that describes a substance's ability to participate in chemical reactions
mixture		any substance that has a defined composition
chemical property		the physical forms of matter, which are solid, liquid, gas, and plasma
volume		a substance that forms in a chemical reaction
element		a measure of the size of a body or region in three-dimensional space
reactant		anything that has mass and takes up space
pure substance		a measure of the gravitational force exerted on an object
matter		a combination of two or more substances that are not chemically combined
chemical reaction		the smallest unit of an element htat maintains the properties of that element
atom		the ratio of the mass of a substance to the volume of the substance
unit		a characteristic of a substance that does not involve a chemical change
conversion factor		either a single element or a single compound, that has definite chemical and physical properties
states of matter		something that has magnitude, size, or amount
weight		composed of dissimilar components