Electron Configuration and Lewis Symbols of Arsenic (As) and Selenium (Se)
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As: Electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^3 Lewis symbol: As with three dots around it
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As3+: Electron configuration: 1s^2 2s^2 2p^6 Lewis symbol: As with two dots around it
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Se: Electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^4 Lewis symbol: Se with four dots around it
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Se2-: Electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 Lewis symbol: Se with six dots around it
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