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Chemistry Ch3 L1

TermDefinition
atom smallest particle of an element
electron negatively charged particle surrounding the nucleus of an atom
nucleus small region in the center of an atom
proton positively charged particles in an atom's nucleus
energy level a specific amount of energy of an electron
neutron a particle in the atom with no electric charge
atomic number number of protons in the nucleus of an atom
isotope atoms with the same number of protons and different numbers of neutrons
mass number the sum of the protons and neutrons in the atom
atomic mass average mass of all the isotopes of that element
periodic table arrangement of elements showing the repeating pattern of their properties
chemical symbol one or two letters that is often an abbreviation of the elements name in English
period periodic table of elements arranged in rows
group periodic table of elements arranged in a column
Created by: angolajones
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