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Chapter 5 Vocabulary
| Term | Definition |
|---|---|
| Period | Each row in table of elements |
| Group | Each column on the periodic table defining valence numbers per element |
| Periodic Law | Pattern of repeating properties |
| Atomic mass unit | One twelfth of a carbon -12 atom |
| Metals | Good conductors of heat and electricity. |
| Transition metals | forms a bridge from the left and right sides of the periodic table. |
| Nonmetals | poor conductors of heat and electric currents |
| Metalloids | properties falling between metals and nonmetals. |
| Valence Electron | Electron in the highest occupied energy level |
| Alkali Metals | Elements in group one |
| Alkaline earth metals | All elements in group two |
| Halogens | Elements in group seven |
| Noble gases | Elements in group eight |
| Periodic table | Arrangement of elements in a column based on properties that repeat row to row. |