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The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all

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Periodic classification of elements is the method by which elements are grouped on the basis of their characteristics - we keep the elements that are alike in one group and the rest of the elements in the other group.


The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all






 
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