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1 st group 3rd period................ its sodium .. see periodic table..
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Answered by
1
Answer:
GROUP 1 and PERIOD 3
The element is Na (Sodium)
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Explanation:
Electronic Configuration : 2,8,1
Since the outer shell contains 1 electron, It belongs to GROUP 1.
The total number of shell is 3, it belongs to PERIOD 3
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