which atom has an electron configuration of 1s²2s²2p⁶3s²3p⁶?
A. He
B. Ar
C. Ne
D. Xe
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which atom has an electron configuration of 1s²2s²2p⁶3s²3p⁶?
A. He
B. Ar
C. Ne
D. Xe
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Answer:
B. Ar
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