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Jacob Hopkins
Chapter 5
Term | Definition |
---|---|
Periodic Table | An arrangement of elements in columns, based on s set of properties that repeat from row to row |
Period | A row in a periodic table of elements. |
Group | Each column on the periodic table. |
Periodic Law | A pattern of repeating properties |
Atomic Mass Unit | One twelfth the mass of a carbon-12 atom. |
Metals | Metals are good conductors of electric current heat. |
Transition Metals | Elements that form a bridge between the elements. |
Nonmetals | Elements that are poor conductors of electric current and heat. |
Metalliod | Elements with properties that fall between metals and nonmetals. |
Valence Electron | An electron that is in the highest level of an atom |
Alkali Metals | Elements in Group 1A |
Alkaline Earth Metals | Elements in Group 2A |
Halogans | Elements in Group 7A |
Noble Gases | Elements in group 8A |