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vocab 2.1-2.2


atom a small partical that is a building block of matter
compound a substance made of two or more elements that are chemically joined in a specific combination
elements a substance made of only one kind of atom.
heterogeneous mixture a mixture in which the substances are not evenly mixed
homogeneous mixture a mixture in which two or more substances are evenly mixed, but not bonded together.
matter anything with a mass and takes up space.
mixture matter that can vary in composition.
substance matter with a composition that is always the same.
atomic number the number of protons in the nucleus of an element
electron the negatively charged particle...outside the nuceus
electron cloud the region surrounding an atom's nucleus that holds electrons.
ion an atom that a charge because it has gained or lost electrons.
isotope an atom of the same element that has a different number of neutrons.
neutron an uncharged particle in the nucleus of an atom.
nucleus the region at the center of an atom.
proton a positively charged particle in the nucleus of an atom.
Created by: mullemar1303