why Na has higher shielding effect. give reason
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The more electron shells there are, the greater the shielding effect experienced by the outermost electrons. ... Therefore, these electrons are not as strongly bound as electrons closer to the nucleus. The shielding effect explains why valence shell electrons are more easily removed from the atom.
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The element sodium has the electron configuration 1s22s22p63s1. The outer energy level is n = 3 and there is one valence electron. The attraction between this lone valence electron and the nucleus with 11 protons is shielded by the other 10 core electrons.
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