Chapter 12, Problem 26CR

Interpretation Introduction

Interpretation:

By using some examples, the valence electrons of some elements should be derived with the help of the location of element in the periodic table.

Concept Introduction:

Periodic table shows the arrangement of elements in order of increasing atomic number. The horizontal rows are periods and vertical rows, or columns are groups. The elements are represented by symbols with atomic number and atomic mass. The element is in its most stable state as it is represented in the periodic table. The group number helps in identifying the valance electrons and some properties of the element.

There are four blocks in which elements are categorized in the periodic table and they help in writing electron configuration of most of the elements.

Electron configuration describes the arrangement of electrons within the orbitals and sub orbitals of an atom. Valence-electron configuration is how electrons are arranged in the outermost shell.