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Periodic Table
| Term | Definition |
|---|---|
| Alkali Metals (Group 1) | Highly reactive metals. So reactive the they are never found uncombined in nature. Metals soft enough to be cut with a butter knife. |
| Alkaline Metals (Group 2) | Fairly reactive metals. Less reactive than alkali metals, but still never found uncombined in nature. They serve as important minerals for our body. |
| Transitional Metals (Group 3-12) | Less reactive metals. Hard, dense metals that are useful as building materials, jewelry and coins. |
| Periodic Table | A table that arranges all of the known elements in order of increasing atomic number and usually coincides with increasing atomic mass. |
| Metals | Solid at room temperature except mercury, shiny luster, ductile, malleable, good conductors of heat and electricity, high density, high melting points, reactive. |
| Nonmetals | No luster, poor conductors of heat and electricity, brittle, not ductile, not malleable, low density, low melting points, less reactive than metals. |
| Metalloids | Elements on both sides of the zigzag line (on the periodic table) have properties of metals and nonmetals. |
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