Chemical Principles
Chemical Principles
8th Edition
ISBN: 9781305581982
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 20, Problem 18E
Interpretation Introduction

Interpretation:The most stable isotope and hottest isotope of krypton is to be identified and time taken for 87.5% of each isotope to decay is to be calculated.

Concept Introduction: The time required to disintegrate exactly half of the radioactive substance is called half life period

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2. A graph shown below shows first ionization energies for elements from H to Ne. First ionization energy/kJ mol 2500 2000 1500 1000 500 T T T T 1 2 3 5 6 7 8 9 10 Atomic number a) Using arguments of electronic structure, explain why ionization energy of Li is much lower than that of H. (2 points) then dips at O. b) Using the same arguments, explain why ionization energy increases from B to N, and (3 points)
Give the name of this compound, including stereochemistry if relevant: CICH2 CH3 Br CH₂CH=CH2 Write in the product, including stereochemistry where relevant, for these reactions. See end of ch. 8, p. 301-303. 1. 03 a) 2-methyl-2-pentene -> 2. Zn, H* Br2 b) 1-ethylcyclopentene -->
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Chemical Principles

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