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Chris Mitchell
Chapter 5
Term | Definition |
---|---|
Periodic Table | an arrangement of elements in columns, based on a set of properties that repeat from row to row |
Period | a row in a periodic table of elements |
Group | a column of elements in a periodic table |
periodic law | the pattern of repeating properties displayed by elements in the periodic table |
Atomic mass unit | one 12th the mass of a Carbon-12 atom |
Metals | elements that a good conductors of heat and electric currents |
Transition Metals | elements that form a bridge between elements on the left and right sides of the periodic table |
Nonmetals | elements that are poor conductors of heat and electric currents. |
Metalliods | 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 of the periodic table not including hydrogen |
Alkaline Earth Metals | the group in 2a of the periodic table |
Halogens | The elements in group 7a of the periodic table |
Noble Gases | elements in group 8a of the periodic table |