An atom of an element has 28 innermost electrons and 7 outermost electrons. In which period of the Periodic Table is this element located?
1. 5
2. 2
3. 3
4. 4
+1
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Home » Chemistry » An atom of an element has 28 innermost electrons and 7 outermost electrons. In which period of the Periodic Table is this element located? 1. 5 2. 2 3. 3 4. 4