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Identify the elements that have the following electron configurations: 1s²2s²2p⁶3s²3p⁶3d⁷4s² *
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Identify the elements that have the following electron configurations:
1s²2s²2p⁶3s²3p⁶3d⁷4s² *

User Eduardo Pinheiro
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That would be calcium (Ca)
User Arcreigh
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