The part of Figure P21.1 that best describes the periodic trend in monatomic anion radii moving up or down a group or across a period in the periodic table is to be stated. Concept introduction: On moving up to down in a group, the principal quantum number ‘n’ increases. Number of shells of electrons increases down the group. Therefore, the size of anion increases down the group. To determine: The part of Figure P21.1 that best describes the periodic trend in monatomic anion radii moving up or down a group or across a period in the periodic table.

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Chapter 22, Problem 22.2VP

Interpretation Introduction

Interpretation: The part of Figure P21.1 that best describes the periodic trend in monatomic anion radii moving up or down a group or across a period in the periodic table is to be stated.

Concept introduction: On moving up to down in a group, the principal quantum number ‘n’ increases. Number of shells of electrons increases down the group. Therefore, the size of anion increases down the group.

To determine: The part of Figure P21.1 that best describes the periodic trend in monatomic anion radii moving up or down a group or across a period in the periodic table.

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