(i) Element A is from the fourth long period (Rb-Xe). Element A has two principal oxidation states. Its lowest oxidation state chloride behaves as both a Lewis acid and a Lewis base, while its highest oxidation state chloride is a colourless liquid which reacts rapidly with water. (ii) Element B is from the second long period (Na-Ar). Its hydride is a solid, which reacts violently with water. Aqueous solutions of its chloride have a pH less than 7.0.

(i) Element A is from the fourth long period (Rb-Xe). Element A has two principal oxidation states. Its lowest oxidation state chloride behaves as both a Lewis acid and a Lewis base, while its highest oxidation state chloride is a colourless liquid which reacts rapidly with water. (ii) Element B is from the second long period (Na-Ar). Its hydride is a solid, which reacts violently with water. Aqueous solutions of its chloride have a pH less than 7.0.

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter20: Chemistry Of Hydrogen, Elements In Group 3a Through 6a, And The Noble Gases

Section: Chapter Questions

Problem 20.2QE

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