Chapter 11, Problem 59AE

Interpretation Introduction

Interpretation:

The identities of three particles having same electronic configuration, namely one is an alkali metal cation, other is anion of the halide ion in third period and third atom is a noble gas have to be identified. Then the particle with smallest and largest atomic/ionic radius has also to be find out

Concept Introduction:

Atomic radii:

The atomic radius of an atom can be defined as the distance between the center of the nucleus and the outermost electron.  In the periodic table, across a period atomic radius decreases and atomic radius increases down the group. For isoelectronic species, the atomic radius increases with decrease of charge on the element.