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Effective nuclear charge of co2+ ion
Accepted Answer
The effective nuclear charge of a Co²⁺ ion is the net positive charge experienced by the valence electrons. To determine it, we need to consider the number of protons in the nucleus and the shielding effect of the core electrons. Cobalt (Co) has 27 protons, and in the Co²⁺ ion, it loses two electrons. The effective nuclear charge is the difference between the number of protons and the number of core electrons. While we can't calculate the exact effective nuclear charge without more advanced methods, we can say it's greater than +25, as the 18 core electrons provide some shielding.
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