Question

write the electron configuration for a neutral atom of antimony.

Explanation:

Step1: Identify atomic number

Antimony (Sb) has an atomic number of 51. This means a neutral atom of antimony has 51 electrons.

Step2: Fill electron - subshells

We fill the sub - shells according to the Aufbau principle, Pauli exclusion principle, and Hund's rule. The order of filling is 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p.
1s can hold 2 electrons, 2s can hold 2 electrons, 2p can hold 6 electrons, 3s can hold 2 electrons, 3p can hold 6 electrons, 4s can hold 2 electrons, 3d can hold 10 electrons, 4p can hold 6 electrons, 5s can hold 2 electrons, 4d can hold 10 electrons, and 5p can hold 6 electrons.
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p³

Answer:

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p³