The noble gas configuration of calcium is:
We shall use the core number of electrons (i.e. electrons in the electronic configuration of Argon, Ar) to determine the shielding constant, S. From there we can compute for the effective nuclear charge.
Recall that the effective nuclear charge is the force exerted by the nucleus onto an electron and is given by:
where Z = nuclear charge or atomic number and S = shielding constant.
If core electrons completely shielded valence electrons from nuclear charge (i.e., if each core electron reduced nuclear charge by 1 unit) and if valence electrons did not shield one another from nuclear charge at all, what would be the effective nuclear charge experienced by the valence electrons of the following atoms?
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