Question

write the electronic configuration of Al(13)​

Answer 1

When we write the configuration we'll put all 13 electrons in orbitals around the nucleus of the Aluminium atom. ... Therefore the Aluminium electron configuration will be 1s22s22p63s23

Answer 2

The electronic configuration of Al(13) is written as follows: 1s² 2s² 2p⁶3s²3p¹.

1s² 2s² 2p⁶ is the electronic configuration of neon. Hence, the electronic configuration of Al can also be written as [Ne] 3s²3p¹.

• First shell in an atom has only one orbital and it can house only 2 electrons. Therefore, 2 electrons out of 13 are present in 1s orbital. 11 electrons remain now.
• Second shell has p orbital besides s orbital. p orbital can contain up to 6 electrons. Thus, 2s will have another 2 electrons and p will have 6 electrons. Thus, 8 electrons out of 11 are filed in the second orbital. Now, 3 electrons are remaining.
• Third shell has d orbital too which can take up to ten electrons.