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The Periodic Table

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by

Raymundo Mora

on 17 October 2013

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Transcript of The Periodic Table

The Periodic Table
Alkali Metals
First Group (or family) of the periodic table, known to be the most reactive
Alkaline Earth Metals
Second group of metals, still reactive in normal pressures and temperatures
Transition Metals
Metalloids
Metalloids are borderline between metals and non-metals .
What is the Periodic Table?
The Periodic Table is a table of all the known elements, organized by their weight and arranged by their chemical properties.
Non- Metals
Halogens
Noble Gases
Protons and Neutrons
Electrons
Electron Clouds
Valence Electrons
These are hard elements with high melting points and posses many properties of metals
Contain characteristics of both element classifications
-Poor conductors of heat and electricity

- Are brittle solids and easily gain electrons
All halogens are toxic and form acids when bonded with hydrogen
*Are also non-metals
Easily react with alkali metals and alkaline earth metals.
Lanthanides
-Easily oxidize when exposed to air
These are the least reactive elements and are all gases at room temperature
-React with water to liberate H2 molecules
-Are considered Earth's rare metals

Actinides

All actinides are radioactive, and are constantly decaying as a result
One of these elements, plutonium, was used as the charge for the first nuclear bombs
As seen below Protons have a positive charge while neutrons have a neutral charge and both can be found in the nucleus
Electrons have a negative charge and move so rapidly around the nucleus that one electron can give the illusion of many
Each electron cloud or energy level has a certain
amount of electrons that it can hold
1st level: 2
2nd level: 8
3rd level: 18
4th level: 32
5th level: 50
Valence electrons are the amount of electrons in the elements last cloud, and the amount of valence electrons ultimately decides how reactive it is
Metals
Metals are malleable and ductile and are good coductors of energy
Thank you
Full transcript