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CBSE Class 10 Answered

How can we find the group number of an element?
Asked by | 11 Jan, 2013, 09:28: PM
answered-by-expert Expert Answer
The group number can be find by the electronic configuration of that atom. For example

Mg. Its atomic no. is 12. The electronic configuration is ( 2,8,2). It has 3 numbers thats why it belongs to 3rd period and the last electronic configuration that is of the outer shell has 2 so it belongs to second group.

 

Answered by | 13 Jan, 2013, 12:02: PM

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