Choose the correct valence electrons.
a. 1 b. 6 c. 7 d. 8
__1. 1s²2s²2p⁴
__2. ¹¹Na
__3. ¹⁸Ar
__4.¹⁷CI
__5.1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴
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Answer:
I think it's first option
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