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Byerly Chapter 12

Chapter 12 vocabulary

periodic table a table that lists all the existing elements
periodic having a regular repeating pattern
periodic law properties of elements are periodic by their atomic numbers
Dmitri Mendeleev created the first periodic table
Henry Moseley created the second periodic table
metals elements that are shiny, good conductors,malleable and ductile
non-metals elements that are dull and are poor conductors
metalloids elements that have properties of both metals and non-metals
periods horizontal rows in the periodic table
groups column of elements in the periodic table
ductile the ability of a substance to be drawn into a wire
malleable the ability of a substance to be pounded into thin sheets
luster an object's ability to reflect light
valence the electrons in an atom's outer most energy level
ion a charged particle that occurs when electrons move from one atom to another
families of elements a column in the periodic table, aka, a group
alkali metals elements in group 1
alkaline metals elements in group 2
transition metals elements in group 3
halogens elements in group 17
noble gases elements in group 18
rare earth elements metal elements found in group 3 of the periodic tableand the 6th and 7th periods, made of two series: Lanthanide and Actinide
lanthanides any of 15 elements from 57-71 that have common properties
actinides elements 90-103 and have common properties
reactivity the tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy
Created by: eqm