Chapter 3.8, Problem 2QQ

Interpretation Introduction

Interpretation:

The pair of electronic configurations that is expected to have similar chemical properties has to be chosen from the given options.

Concept Introduction:

Periodic law states that if the elements are arranged in increasing order of atomic number, then the elements with similar chemical properties occur at regular intervals or periodic intervals.  The elements are arranged in a periodic table in which the arrangement was based on the atomic number of the elements and the elements that have similar chemical properties are positioned in vertical columns.

Location of an element in a periodic table can be given by the period number and the group number.  The horizontal row in a periodic table where the elements are present is known as Period.  The vertical column in a periodic table where the elements are present is known as Group.

Chemical properties of the elements repeat themselves at regular intervals because of the electronic configuration.  The elements that are present in a Group have similar chemical properties.  This is because the outer-shell electronic configuration will be the same.