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periodic table

TermDefinition
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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