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Chptr 12 Vocab
Periodic Table
| Word | Definition |
|---|---|
| Periodic | Describes something that repeats or occurs at regular intervals. |
| Periodic Law | Law that states that the repeating chemical and physical properties of elements change periodacally with the atomic numbers of the elements. |
| Period | A horizontal row of elements in the periodic table. |
| Group | A vertical column of elements in the periodic table. Elements in the group share chemical properties. |
| Alkali Metals | One of the elements of Group 1 of the periodic table. |
| Alkaline-Earth Metals | One of the elements of Group 2 of the periodic table. |
| Halogen | One of the elements of Group 17 of the periodic table. Halogens combine with most metals to form salts. |
| Noble Gas | one of the elements of Group 18 of the periodic table. Noble Gases are unreactive. |