Arrange the atoms in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell: K, Mg, P, Rh, and Ti.

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19-12-2022
Chemistry

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Arrange the atoms in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell: K, Mg, P, Rh, and Ti.

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contexto1212 contexto1212 · Answer 1 · 2022-12-22T10:03:57-05:00

The order of the atoms of increasing effective nuclear charge is,

Mg < P < K < TI < Rh

The effective nuclear charge increases as we move across the period and as we move down the group effective nuclear charge decreases. The effective nuclear charge on the electrons of the inner shell is more as compared to the electrons of the outermost shell. Rh has the highest number of protons and the 3rd shell is its inner shell. Therefore, the force of attraction experienced by it is the greatest. Tl has more protons so its effective nuclear charge on the electron of the 3rd shell is significant. P and Mg lie in the same period and the effective nuclear charge becomes more as we move across the period. The position of K is down the group in the periodic table and the 3rd shell is its outermost shell.

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