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CBSE Class 10 Answered

groups of mordern preodic table
Asked by | 31 Mar, 2008, 12:08: PM
answered-by-expert Expert Answer

The modern periodic table consists of 18 vertical columns called groups.Elements in a group have same number of valence electrons. The properties of an atom are determined mainly by no. of valence electrons so the  elements in a group have similar properties. 

Answered by | 20 Dec, 2017, 05:55: PM

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