Question

electron configuration & orbital practice
electron configurations in the periodic table
fill out the electron configuration for aluminum

Explanation:

Step1: Locate aluminum on periodic table

Aluminum (Al) has atomic number 13.

Step2: Follow electron - filling order

Start with 1s orbital which can hold 2 electrons: $1s^{2}$. Then 2s orbital (holds 2 electrons): $2s^{2}$. Then 2p orbital (holds 6 electrons): $2p^{6}$. After that, 3s orbital (holds 2 electrons): $3s^{2}$. Finally, remaining 1 electron goes to 3p orbital: $3p^{1}$.

Answer:

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