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Vocab Chap12, Schuff
Periodic Table
| Question | Answer |
|---|---|
| Periodic- | describes something that occurs or repeats at regular intervals. |
| Periodic Law- | the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of elements. |
| Period- | in chemistry, a horizontal row of elements in the periodic table. |
| Group- | a vertical column of elements in the periodic table; elements in a group share chemical properties. |
| Alkali Metals- | Elements in group one of the periodic Table of Elements. |
| alkaline earth metal- | less reactive than alkali metals are. |
| Halogens- | very reactive nonmetals because their atoms need to gain only one electron to have a complete outer level. |
| Noble Gas- | unreactive nonmetals and are in group 18 of the periodic table. |