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2015-08-07T15:33:03+08:00
The major elements are composed of the lightest or yung nauuna :) like Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen and Fluorine. ^_^
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2015-08-09T19:16:38+08:00

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In chemistry and atomic physics, the main group is the group of elements whose lightest members are represented by helium, lithium,beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements.
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