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The Periodic Table of Elements

Organization: Groups and Periods
by

Teika Clavell

on 24 September 2013

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Transcript of The Periodic Table of Elements

Groups
and
Periods

The Periodic Table
Who is that guy?
Dmitri Mendeleev is generally credited with the creation of the basis for our modern periodic table (1863). Although he was not the first to suggest using a "table" to organize the elements, he was the first to create one.
Notice any similarities?
So what is the
Periodic Table
?
The periodic table is a
chart that organizes information about all the known
elements
according to their
properties
.
Groups
The group in the periodic table represents a chemical family. Elemental groups are found vertically on the table.
Alkaline Earth Metals
Alkali Metals
Periods
A period on the periodic table runs horizontally. When looking at the periodic table, the periods run from left to right.
There are 7 Periods
There are 18 Groups
Alkali Metals
Located Group 1 on the periodic table
Lower densities than other metals
Highly reactive
Alkaline Earth Metals
Alkaline Earth Metals
Located at the 2nd group on the periodic table
Slightly greater density than Alkali Metals
Highly reactive
Transition Metals
Metals
Metalloids
Non-Metals
Halogens
Noble Gases
Transition Metals
Groups 3-12
Very hard
High melting point
High boiling point
Malleable
High electric conductivity
Group 13-15 (parts)
Shiny
Dense
Ductile
Malleable
Thermal Conductors
Electric Conductors
Groups 13-16 (parts)
Located on the "stair step"
Properties of metals and nonmetals
Often make good semiconductors
The red elements are metalloids!
Not a good thermal conductor
Not a good electric conductor
Little to no metallic luster
Brittle solids
Gains electrons easily
Group 17
Highly reactive
Nonmetals
Group 18
Gases at room temperature
Non-reactive
Low boiling point
Full transcript