1.

Which element has a complete valence electron shell ? selenium(Se). oxygen (O)

Answer»

selenium (SE) Oxygen (O) ' flurin (F). it will argon.

noble gas has always complete valence electron SHELL .

it have been found that have valence of 2-8 =6. (se) &(O) are the 16 group of elements .

so both have complete electron shell .



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