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Chapter 5 Vocabulary
Question | Answer |
---|---|
An arrangement of elements in columns, based on a set of properties that repeat from row to row. | Periodic Table |
Each row in the table of elements. | Period |
Each column on the periodic table. | Group |
The pattern of repeating properties. | Periodic Law |
One twelfth the mass of a carbon-12 atom. | Atomic Mass Unit (AMU) |
Elements that are good conductors of electric current and heat. | Metals |
Elements that form a bridge between the elements on the left and right sides of the table. | Transition Metals |
Elements that are poor conductors of heat and electric current. | Nonmetals |
Elements with properties that fall between those of metals and nonmetals. | Metalloids |
An electron that is in the highest occupied energy level of an atom. | Valence Electron |
Elements in Group 1A. | Alkali Metals |
Elements in Group 2A. | Alkaline Earth Metals |
Elements in Group 7A. | Halogens |
Elements in Group 8A. | Noble Gases |