Terms in this set (7)
the number of protons in the nucleus of an atom, which determines its place in the periodic table.
the number of protons plus the number of neutrons in an atom
elements with a shiny or metallic luster and are good conductors of heat and electricity
elements that look dull; they're poor conductors of heat and electricity but essential to life
elements having characteristics of both metals and nonmetals; usually solid and brittle
horizontal rows (left to right) on the Periodic Table
vertical rows (up and down) on the Periodic Table; also called columns or families
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