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Periodic Table Vocab

TermDefinition
Valence Electron An electron that resides in the outermost shell, or principal quantum level, of an atom.
Periodic Table A chart that scientists use to organize and classify all the different elements.
Periods The horizontal rows on the periodic table.
Groups Vertical columns of elements on the periodic table with similar valence electron configurations and similar properties.
Metals Elements that give up electrons easily, are malleable and ductile, and are good electrical conductors.
Nonmetals Elements that are poor electrical conductors and tend to accept electrons easily.
Metalloids Elements that lie between the metals and the nonmetals on the periodic table; these elements exhibit both metallic and nonmetallic properties.
Atomic Number The number of protons in the nucleus of an atom; atomic number determines the chemical properties of the atom.
Atomic Mass The combined mass of all the protons and neutrons of an atom. Since each proton and neutron has a mass of approximately one unit. The atomic mass is approximately equal to the number of protons and neutrons.
Created by: gracie.monceret