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Chapter 5 Vocab

TermDefinition
Periodic Table An arrangement of the elements in columns, based on a set of properties that repeat from row to row
Period Each row of the periodic table
Group Each column on the periodic table
Periodic Law Properties of elements repeated in a predictable way when atomic numbers are used to arrange elements into groups
Atomic Mass Unit (AMU) 1/12 the mass of a carbon-12 atom
Metals Elements that are good conductors of electric current and heat
Transition Metals Elements that form a bridge between the elements on the left and right sides of the table
Nonmetals Elements that are poor conductors of heat and electric current
Metalloids Elements with properties that fall between those of metals and nonmetals
Valence Electron An electron that is in the highest occupied energy level of an atom
Alkali Metals The elements in Group 1A
Alkaline Earth Metals The elements in Group 2A
Halogens The elements in Group 7A
Noble Gases The elements in Group 8A
Created by: david.ernst
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