## Related questions with answers

Question

Predict the ground-state electron configurations of $\mathrm{Al}$. Ga, and In.

Solution

VerifiedAnswered 2 months ago

Answered 2 months ago

Step 1

1 of 2We have to write electron configurations for Al, Ga and In.

First, we find electron configuration for Al $(Z=13)$ :

$1s^2 2s^2 2p^6 3s^2 3p$

Total number of electrons is : $(2+2+6+2+1=13)$

Next, we find electron configuration for Ga $(Z=31)$ :

$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p$

Total number of electrons is : $(2+2+6+2+6+2+10+1=31)$

Finally, we find electron configuration for In $(Z=49)$ :

$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^6 5s^2 4d^{10} 5p$

Total number of electrons is : $(2+2+6+2+6+2+10+6+2+10+1=49)$

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