Periods and Groups of Elements - Coppin State University
Periods and Groups of Elements,
Metals, Nonmetals and Metalloids
Period 1---2 elements
Period 2---8 elements
Period 3---8 elements
Period 4--18 elements
Period 5--18 elements
Periods-A single horizontal row
Period 6--32 elements
Period 7--32 elements
Metalloids include: B, Si, Ge, As, Sb,
Te, Po, and At. They are
semiconductors; They are sometimes
used as insulators of electric wires.
Metals are shiny solids. They are good
conductors of electricity and heat. All
metals are solid except mercury, Hg,
which is a liquid
Groups- A single vertical column of
Group 1A-8ARepresentative Elements
Group 1A-Alkali metals-very reactive
Group2A-Alkalline earth metals- less
Group 7A- Halogens-F, Cl, Br, I
Group 8A-Noble gases- He, Ne, A
Metals are the elements to the left of
the zigzag line, except hydrogen.
Nonmetals are the elements to the
right of the zigzag line.
Metalloids are the elements located on
the zigzag line.. They are of electricity.
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