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Chem CH3
Chemistry CH3 Introduction to the Periodic Table
| Term | Definition |
|---|---|
| actinide | any of the second series of inner transition elements with atomic numbers from 90 to 103; all are radioactive |
| group | the elements in a vertical column of the periodic table |
| lanthanide | one of the first series of inner transition elements with atomic numbers 58 to 71 |
| metal | an element that has luster, conducts heat and electricity, and usually bends without breaking |
| metalloid | an element with some physical and chemical properties of metals and other properties of nonmetals |
| noble gas | an element from group 18 that has a full complement of valence electrons and as such is unreactive |
| nonmetal | an element that in general does not conduct electricity, is a poor conductor of heat, and is brittle when solid; many are gases at room temperature |
| period | horizontal row in the periodic table |
| periodicity | the tendency to recur at regular intervals |
| periodic law | the statement that the physical and chemical properties of the elements repeat in a regular pattern when they are arranged in order of increasing atomic number |
| semiconductor | an element that does not conduct electricity as well as a metal, but that does conduct slightly better than a nonmetal |
| transition element | any of the elements in groups 3 through 12 of the periodic table, all of which are metals |
Created by:
djhockett5
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