Chapter 6, Problem 79A

Interpretation Introduction

Interpretation:

The reason for s-block of the periodic table has two groups wide, the p-block has six-groups wide and d-block has ten-groups wide needs to be explained.

Concept introduction:

Periodic table is a tabular representation of chemical elements together with their symbols, atomic numbers and atomic masses. The chemical characteristics of each element are determined by their protons and electrons number.

Answer to Problem 79A

In s- block, two groups are present alkali metals (group 1) and alkaline earth metals. In the periodic table Groups 13-18 elements are known as p block elements. The d- block elements are known as transition elements. In periodic table, Groups 3-12 elements are known as d- block elements.

Explanation of Solution

The s orbital can hold maximum number of two electrons. Hence, s block

consist of two groups IA and IIA. The p orbitals hold maximum two electrons, but there are three p orbitals. Hence, the maximum electrons are six and p block has six groups IIIA-VIIIA. The d orbitals hold maximum two electrons, but there are five d orbitals. Hence, the maximum electrons are 10 and it has ten groups IB-VIIIB (VIIIB contains three groups).