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2.1-2.2 vocab

Matter matter is anything that has mass and takes up space
atom an atom is a small particle that is the building block of matter
substance a substance is matter with a composition that is always the same
element an element is a substance made of only one kind of atom
molecule a molecule is two or more atoms that are held together by chemical bonds and act as a unit
compound a compound is a substance made of two or more elements that are chemically joined in a specific combination
mixture a mixture is matter that can vary in composition
heterogeneous mixture a heterogeneous mixture is 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
nucleus the nucleus is the region at the center of an atom that contains most of the mass of the atom
proton a proton is a positively charged particle in the nucleus of an atom
neutron a neutron is an uncharged particle in the nucleus of an atom
electron an electron is a negatively charged particle that occupies the space in an atom outside the nucleus
electron cloud an electron cloud is the region surrounding an atom's nucleus where one or more electrons are most likely to be found
atomic number the atomic number is the number of an atom of an element
isotope an isotope is one of the two or more more atoms of an element having the same number of protons, but a different number of neutrons
ion an ion is an atom that has a charge because it has gained or lost electrons
Created by: harbahal2693