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chapter 1 review

atoms and matter

homogeneous mixture a mixture in which two or more substances are not evenly mixed but not bonded together
matter any thing that has a mass and takes up space
elements substance made of only one kind of atom
atom a small particle that is the building block of matter
compound substance made of two or more elements that are chemically joined in a specific combination
heterogeneous mixture a mixture in which the substances are not evenly mixed
molecule two or more atoms that are held together by chemical bonds and act as a unit
substance matter with a composition that is always the same
proton positively charged particle in the nucleus of an atom
electron cloud region surrounding an atom's nucleus where one or more electrons are often found
electron negatively charged particle that occupies the space in an atom outside the nucleus
isotope one or more atoms of an element having the same number of protons but a different number of neutrons
nucleus region at the center of an atom that contains most of the mass of an atom
ion an atom that has a charge because it has gained or lost electrons
atomic number then number of protons in the nucleus of an atom of an element
neutron uncharged particle in the nucleus of an atom
Created by: adamsgab2251