19 terms

Chapter 19 Study Set

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periodic table
A chart that classifies elements by their properties
metals
One of a class of elements that are good conductors of heat and electric current; metals tend to be ductile, malleable, and shiny
nonmetals
elements that are usually dull in appearance, poor conductors of heat and electricity, gases at room temperature
metalloid
an element that has properties of both metals and nonmetals
malleable
capable of being shaped or bent or drawn out
ductile
a term used to describe a material that can be pulled out into a long wire
coinage metals
those elements found in coins: silver, copper, gold
synthetic elements
Elements which do not occur naturally and are made in laboratories.
alkali metals
name for Group 1
alkaline metals
name for group 2
halogens
group 17:
metallic bonding
the chemical bonding that results from the attraction between metal atoms and the surrounding sea of electrons
Noble gas
group 18; Inert gas family : very stable
semiconductors
metalloids or semi- metals: located on the zig zag line
Actinide series
Elements 90-103
Lanthanide series
Elements 57-71
transition metals
groups 3-12
allotrope
Different forms of the same element; have different properties due to different arrangements of the atoms (e.g., graphite, diamond, bucky ball)
diatomic
A molecule that consists of two atoms of the same element