Question

Effective nuclear charge for last electron of the iron atom

Answer 1

Effective nuclear charge – the attractive positive charge of nuclear protons acting on valence electrons.

The effective nuclear charge is always less than the total number of protons present in a nucleus due to shielding effect.

Effective nuclear charge is behind all other periodic table tendencies.

Shielding effect – the lessening of attractive electrostatic charge difference between nuclear protons and valence electrons by partially or fully filled inner shells.

Shielding effect increases with the number of inner shells of electrons.

Electrons sharing the same shell do not shield one another from the attractive pull of the nucleus.

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