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Chapter 5 Vocab.
Mrs. Neary's Physical Science - Chapter 5 Vocabulary Words
| Term | Definition |
|---|---|
| Periodic Law | The law that states that the repeating chemical and physical properties of elements change periodically 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. |
| Ion | An atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge. |
| Metal | An elements that is shiny and that conducts heat and electricity well; located on the right side of the periodic table. |
| Nonmetal | An element that conducts heat and electricity poorly; located on the left side of the periodic table. |
| Semiconductor | An element or compound that conducts electric current better than an insulator does but not as well as a conductor does; also called a metalloid. |
| Alkali Metal | One of the elements of Group 1 of the periodic table. |
| Alkaline-Earth Metal | One of the elements of Group 2 of the periodic table. |
| Transition Metal | One of the metal that can use the inner shell before using the outer shell to bond. |
| Noble Gas | One of the elements of Group 18 of the periodic table. |
| Halogen | One of the elements of Group 17 of the periodic table. |