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3.1-3.3 vocab
Voc lesson 1-3 ch 3
| Term | Definition |
|---|---|
| periodic table | a chart of the elements arranged into rows and columns according to their physical and chemical properties. |
| group | a column on the periodic table. |
| period | a row on the periodic table. |
| metal | an element that is generally shiny, is easily pulled into wires or hammered into thin metal sheets, and is good conductor of electricity and thermal energy. |
| luster | the way a mineral reflects or absorbs light at its surface. |
| ductility | the ability to be pulled into thin wires. |
| malleability | the ability of a substance to be hammered or rolled into sheets. |
| alkali metal | an element in group 1 on the periodic table. |
| alkali earth metal | an element in group 2 on the periodic table. |
| transition element | an element in groups 3-12 on the periodic table. |
| nonmetal | an element that has no metallic properties. |
| halogen | an element in group 17 on the periodic table. |
| noble gas | an element in group 18 on the periodic table. |
| metalloid | an element that has physical and chemical properties of both metals and nonmetals. |
| semiconductor | a substance that conducts electricity at high temperatures but not at low temperature. |