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scich18

TermDefinition
atom mallest piece of matter that still retains the property of the element
nucleus center of an atom
electron are particles with an electrical charge of -1
protron particles with a charge of +1
neutron neutral particles with no electrical charges
quark small particles that make up protons and neutrons
electron cloud the area around the nucleus of an atom where its electrons are found
atomic number the # of protons in an atom is equal to this #
mass number is the sum of the # of protons and the # of neutrons in the nucleus
isotope atoms of the same elements that have different # of neutron
average atomic mass the weight- average mass of the mixture of isotopes
periodic table the elements are arranged by increasing atomic # and by changes in physical and chemical properties
groups the vertical columns in the periodic table
electron dot diagram is used to represent the electrons in the outer energy level
period the horizontal rows on the periodic table
Created by: MaurieGAllen
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