tacogirl02 tacogirl02

20-10-2016
Physics

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When Mendeleev organized elements in his periodic table in order of increasing mass, similar elements with similar properties were in the same (Blank)

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ampofoeugenia7 ampofoeugenia7

20-10-2016

similar elements with similar properties were in the same groups and periods for instance lithium(Li) and sodium(Na) are alkaline metals and so belong to the same group (that is group 1).Also Hydrogen(H) and Helium(He) both have only one shell or energy level and so belong to the same period.

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