Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
Related questions
Question
4

Transcribed Image Text:What is the general trend in first ionisation
energies across Period 3?
4
a
Explain why aluminium has a lower first
ionisation energy than magnesium.
Explain why sulfur has a lower first ionisation
energy than phosphorus.
Look at Period 4 in the Periodic Table
(Appendix 1)..
The first ionisation energies of the p-block
elements are given in the table below.
Predict the missing value for the first ionisation
energy of selenium.
d
bas
p-block element
of Period 4
Atomic
First ionisation
number
energy/ kJ mol-1
gallium (Ga)
31
577
germanium (Ge)
32
762
arsenic (As)
33
966
selenium (Se)
34
bromine (Br)
35
1140
36
1350
krypton (Kr)
Table 10.7: Information table for Question 4.
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