Electronic configuration of an element is 2,8,7. The atomic number of this element is----and its symbol is ---
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16
Answer:
atomic no. 17
symbol = Ar
Answered by
22
Answer:
2,8,7 = chlorine
configuration = 1s^2 , 2s^2 , 2p^6 , 3s^2 , 3p^5
symbol = Cl
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