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The ground state electron configurations...

The ground state electron configurations listed here are incorrect. Identify the mistakes that have been made in each and write the correct electronic configurations.
`Al, 1s^(2) 2s^(2) 2p^(4) 3s^(2) 3p^(3)`

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3s orbital cannot be filled before complete filling of 2p orbital. So, this configuration is incorrectly written.
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