How can we find the group number of an element?

Asked by  | 11th Jan, 2013, 09:28: PM

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  | 13th Jan, 2013, 12:02: PM

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