Chapter 8, Problem 8.86QP

Interpretation Introduction

Interpretation:

A fuming red liquid, a dark metallic-looking solid, a pale–yellow gas, and a yellow-green gas that attacks glass has to be identified among the first four members of Group 7A

Concept Introduction:

Group 7A in the periodic table contains 7 valence electrons and the outer electronic configuration of halogens is${\text{ns}}^{\text{2}}{\text{np}}^5$. Fluorine, chlorine, bromine, iodine and astatine are the halogens.