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periodic table
| Term | Definition |
|---|---|
| Dmitri Mendelev | Creator of the periodic table |
| Periodic table in order of.... | atomic numbers |
| 18 Vertical columns | 18 groups |
| 7 Horizontal rows | 7 periods |
| Families have.... | Properties and electron numbers in common |
| Valence Electrons | Electrons that are the farthest from the nucleus: help atoms bond with other atoms. |
| Alkali Metals | Group 1; Most reactive of all metals; do not occur in nature in their element form |
| Halogens Family | Group 17; Contains 7 electrons in their outer shell. |
| Noble Gases | Group 18; exist as isolated atoms; all are stable because outer energy level is filled |
| Alkaline Earth Metals | Group 2; Shiny, ductile, malleable; combine readily with other elements |
| Transition Metals | Groups 3-12; most familiar metals because they often occur in nature uncombined |
| Inner Transition Metals | Lanthanide Series & Actinide Series |
| Metals | Most of the elements are metals; Luster, ductile, malleable, good conductor; Mostly solid at room temperature (except Mercury) |
| Non-Metals | Elements are usually gases or brittle solids at room temperature |
| Metalloids | Elements that make up the stair step; metallic and non-metallic properties |
Created by:
liz.joyy
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