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Lauren Reynolds
Chapter 5 Vocab
Term | Definition |
---|---|
Periodic table | An arrangement of elements in columns, based on a set of properties that repeat from row to row. |
Period | Each row in the table of elements. |
Group | Each column on the periodic table. |
Periodic Law | The pattern of repeating properties. |
Atomic Mass Unit | Defined as one twelfth 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. |