For the given spheres arranged in the increasing order of size, it should be arranged the given ions corresponding to that arrangement. Concept introduction: Isoelectronic species are those molecule, atom, or ion which has the same electronic structure and same valence electron. While donating electrons from an atom, positive ions will form and size of the ion will decrease At the same time while accepting the electron, negatively charged ions will form and the size of ions will increase In the positively charged ions electrons are donating and effective nuclear charge will increase and thereby size of the ion will decrease. In the negatively charged ions, electrons are accepting and effective nuclear charge will decreases there by size of the ion will increase In the periodic table, on moving from top to bottom the atomic size will increase and on moving from left to right, atomic size will decrease.

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Chapter 4, Problem 4.4KSP

Interpretation Introduction

Interpretation: For the given spheres arranged in the increasing order of size, it should be arranged the given ions corresponding to that arrangement.

Concept introduction:

Isoelectronic species are those molecule, atom, or ion which has the same electronic structure and same valence electron.

While donating electrons from an atom, positive ions will form and size of the ion will decrease At the same time while accepting the electron, negatively charged ions will form and the size of ions will increase

In the positively charged ions electrons are donating and effective nuclear charge will increase and thereby size of the ion will decrease. In the negatively charged ions, electrons are accepting and effective nuclear charge will decreases there by size of the ion will increase

In the periodic table, on moving from top to bottom the atomic size will increase and on moving from left to right, atomic size will decrease.

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