click below
click below
Normal Size Small Size show me how
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 |