الخلاصة

In this research we had used the division technique for the analysis of atomic open-shell of Boron-ion in the (1s 22s) state using Hartree-Fock (HF) approach. The energies and some atomic properties for each shell for the Boron-ion (K-shell, KL (singlet) and KL (triplet)) have been calculated. The calculated total energy of Boron-ion. All the results of the expectation values were checked according to normalization condition. The atomic units were used in the calculations as well.