Chapter 5.7, Problem 5.8PSP

Interpretation Introduction

Interpretation:

The electron configuration of selenium and tellurium in noble gas notation and Lewis dot symbols have to be given.  Also, the conclusion from the electron configurations of these elements in same main group has to be given.

Concept Introduction:

Electron configuration: The complete description of the atomic orbitals occupied by all the electrons in an atom or monoatomic ion is known as its electron configuration.

Lewis dot symbol:

• In Lewis dot symbol an element symbol is surrounded by a number of dots equal to the number of valence electrons. 
• Symbol of the element indicates the atomic nucleus together with core electrons. 
• The dots are placed to the right of the symbol, to the left, above and below. 
• Dots are added one at a time until all valence electrons are represented. 
• If there are more than four valence electrons, dots are paired with existing ones.