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Question
Answer the following question.
The electronic configuration of some element is given below:
1s2 2s2 2p6
In which group and period of the periodic table the element is placed?
Solution
1s2 2s2 2p6
Here n = 2. Therefore, the element belongs to the 2nd period.
The outer electronic configuration 2s2 2p6 corresponds to the complete octet. Therefore, the element is placed in the 2nd period of group 18 in the modern periodic table.
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