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For fluorine it is 2 s 2, 2 p 5, for chlorine 3 s 2, 3 p 5 for bromine 4 s 2, 4 p 5, and for iodine it is 5 s 2, 5 p 5. In short, all the halogens have 7 electrons at the outermost quantum level or 5 electrons in the outermost p orbitals.
Thus, its complete electron configuration is 1s2, 2s2 2p6, 3s2 3p6, 4s2 3d10 4p6, 5s2 4d â¦ 10 5p6, 6s2 4f14 5d10 6p4. From this, we see that its highest number shell, which is its valence shell is 6. Thus the valence electron configuration of polonium is 6s2 6p4.ince gallium's atomic number is 31, we know that it has 31 protons and 31 electrons. Thus, its complete electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1. From this, â¦ we see that its highest number shell, which is its valence shell is 4. Thus the valence electron configuration of polonium is 4s2 4p1.