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5. Determine which of the following electron configurations are not valid , explain WHY, write correct electron configuration, and identify the correct element. 1s^22s^22p^63s^23p^64s^24d^104p^5 1s^22s^22p^63s^23d^5 1s^22s^22p^23s^2 [xe] [Ne]1s^22s^2

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5. Determine which of the following electron configurations are not valid , explain WHY, write correct electron configuration, and identify the correct element. 1s^22s^22p^63s^23p^64s^24d^104p^5 1s^22s^22p^63s^23d^5 1s^22s^22p^23s^2 [xe] [Ne]1s^22s^2

5. Determine which of the following electron configurations are not valid , explain WHY, write correct electron configuration, and identify the correct element. 1s^22s^22p^63s^23p^64s^24d^104p^5 1s^22s^22p^63s^23d^5 1s^22s^22p^23s^2 [xe] [Ne]1s^22s^2

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### The invalid electron configurations are:<br />1. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}4d^{10}4p^{5}$: This configuration is invalid because the 4d orbital should not be filled before the 4p orbital. The correct configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{5}$, corresponding to Bromine (Br).<br /><br />2. $1s^{2}2s^{2}2p^{6}3s^{2}3d^{5}$: This configuration is invalid because the 3d orbital should not be filled before the 3p orbital. The correct configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{5}$, corresponding to Manganese (Mn).<br /><br />3. $1s^{2}2s^{2}2p^{2}3s^{2}$: This configuration is invalid because the 3s orbital should not be filled before the 2p orbital is fully filled. The correct configuration is $1s^{2}2s^{2}2p^{4}$, corresponding to Oxygen (O).<br /><br />4. $[Ne]1s^{2}2s^{2}$: This configuration is invalid because $[Ne]$ already includes $1s^{2}2s^{2}2p^{6}$. The correct configuration should be $[Ne]$, corresponding to Neon (Ne).

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## Step1: Identify the invalid electron configurations<br />### Review each given electron configuration to check for adherence to the Aufbau principle, Hund's rule, and the Pauli exclusion principle.<br />## Step2: Correct the invalid electron configurations<br />### Rectify the configurations that do not follow the rules, ensuring the correct order of filling orbitals.<br />## Step3: Identify the correct elements<br />### Determine the element corresponding to each corrected electron configuration.
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