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STAAR Periodic Table
Periodic table terms
| Term | Definition |
|---|---|
| Group | Vertical Column, Same Valence |
| Period | Horizontal Row; Same Energy Levels |
| Metals | Shiny, Conductive, Ductile, Malleable |
| Nonmetals | Brittle, not conductive, includes gases |
| Metalloids | Some but not all properties of Metals |
| Element | Pure substance |
| Compound | Two or more elements combined |
| Subscript | Number below the line following element's symbol |
| Coefficient | Number on the line in front of element or compound |
| Most Reactive Groups | Groups 1 & 17; Alkali Metals & Halides |