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Periodic Table

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Camry Tompkins

on 20 February 2014

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Transcript of Periodic Table

a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
Periodic Table:
Atomic number
Atomic Mass
elements are arranged in a series of rows (or periods) so that those with similar properties appear in a column. Elements of the same period have the same number of electron shells
a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups

*All of the halogens form acids when bonded to hydrogen
*Group 17
*Halogens are very toxic
*Aka "Salts"
*Oxidation # is -1
*Room temperature
*7 Electrons in outer shell
Alkali Metals
*In group 1
*Very reactive
*1 electron in the outer shell
*Good conductors
Alkaline Earth Metals
*Second group
*Very reactive
*Oxidation # is 2
on met
*Groups 3-12
*All metals
*Great conductors
*Ductile and malleable

Chemical Families
Noble gases
*They are all stable
Valence Electrons
The valence electrons are the electrons in the last shell or energy level of an atom. They do show a repeating or periodic pattern. The valence electrons increase in number as you go across a period. Then when you start the new period, the number drops back down to one and starts increasing again.
Oxygen has 6 valence electrons
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