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George Review 3

QuestionAnswer
Who proposed the atomic theory? John Dalton
The center of an atom; made up of protons and neutrons nucleus
a positively charged subatomic particle in the nucleus of an atom proton
a neutral subatomic particle in the nucleus of an atom neutron
a tiny negatively charged subatomic particle moving around the outside of the nucleus electron
any possible energy that an electron can have energy level
a region in an atom where there is a high probability of finding electrons. orbital
an electron in the outermost energy level of an atom valence electron
a horizontal row of elements in the periodic table period
a vertical column of elements in the periodic table group
an atom or group of atoms that has lost or gained one or more electrons and therefore has a net electric charge ion
an ion with a positive charge cation
an ion with a negative charge anion
the elements that are good conductors of heat and electricity metals
the elements that are usually poor conductors of heat and electricity nonmetals
the elements that are intermediate conductors of heat and electricity semiconductors
the highly reactive group I elements alkali metals
the reactive group II elements alkaline earth metals
the highly reactive nonmetal elements of group 17 halogens
the unreactive gases of group 18 noble gases
the number of valence electrons that group I elements have one
the number of valence electrons that group II elements have two
the number of valence electrons that group 17 elements have seven
the number of valence electrons that group 18 elements have eight
Created by: jgeorge
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