The atomic numbers of phosphorus, sulphur and potassium are 15, 16 and 19 respectively. The formulae of their ions are P3-, S^2- and K⁺. These ions have the same number of electrons

The atomic numbers of phosphorus, sulphur and potassium are 15, 16 and 19 respectively. The formulae of their ions are P3-, S^2- and K⁺. These ions have the same number of electrons
i) Write the electron arrangement of the ions
ii) Arrange the ions in the increasing ionic radius starting with the smallest. Give a reason for the order

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i) 2.8.8

ii) K⁺, S^2-, P^3-
The number of protons reduce in the order given reducing the effective nuclear pull on electrons

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johnmulu answered the question on February 2, 2017 at 07:33

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