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Chapter5Vocab
Chapter5VocabWords
| 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 Periodic table is named this |
| Group | Each column in the Periodic table is named this |
| Periodic Law | The pattern of repeating properties |
| Atomic Mass Unit (AMU) | Defined as one-twelfth 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 Periodic 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 | These metals have a single valence electron and are extremely reactive. Group 1A |
| Alkaline Earth Metals | These metals have two valence electrons. Group 2A |
| Halogens | Each of these has 7 valence electrons. Group 7A |
| Noble Gases | All of these elements contains 8 valence electrons except for Helium. Group 8A |