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Vocab 2.1-2.2


Atom a small particle that is the building block of matter
Compound a substance made of two or more elements that are chemically joined in specific combination
Element a substance made of only one kind of atom
Heterogeneous Mixture a mixture in which the substances are evenly mixed, but not bonded together
Matter anything that has mass and takes up space
Mixture matter that can vary in composition
Molecule two or more atoms that are held together by bonds and act as a unit
Substance matter with a composition that is always the same
Atomic Number the number of protons in the nucleus of an atom of an element
Electron a negatively charged particle that occupies the space in an atom outside the nucleus
Electron Cloud the region surrounding an atom's nucleus where one or more electrons are most likely to be found
Ion an atom that has a charge because it has gained or lost electrons
Isotope one of two or more atoms of an element having the same number of protons, but a different number of neutrons
Neutron an uncharged particle in the nucleus of an atom
Nucleus the region at the center of an atom that contains most of the mass of the atom
Proton a positively charged particle in the nucleus of an atom
Created by: gayhakat2690