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Chapter 1 Review

Atoms and Molecules

positively charged particle in the nucleus of an atom proton
region surrounding an atom's nucleus where one or more electrons are often found electron cloud
negatively charged particle that occupies the space in an atom outside the nucleus electron
one or more atoms of an element having the same number of protons but a different number of neutrons isotope
region at the center of an atom that contains most of the mass of an atom nucleus
an atom that has a charge because it has gained or lost electrons ion
the number of protons in the nucleus of an atom of an element atomic number
uncharged particle in the nucleus of an atom neutron
Created by: laswemas2699