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Identify the elements that have the following electron configurations: 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶ *
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Identify the elements that have the following electron configurations: 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶ *

User Serious
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That would be Selenium (Se)
User Hooman Askari
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