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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 |