Chemistry
Chemistry
4th Edition
ISBN: 9780078021527
Author: Julia Burdge
Publisher: McGraw-Hill Education
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Chapter 7, Problem 1KSP

Often we can compare properties of two elements based solely on periodic trends. For which pair of elements is the periodic trend not sufficient to determine which has the higher first ionization energy?

( a ) C and Si ( b ) Al and Ga ( c ) Ga and Si ( d ) Tl and Sn ( e ) B and Si

Expert Solution & Answer
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Interpretation Introduction

Interpretation:

A pair of elements is to be identified, which cannot be compared on the basis of ionization enthalpy by using the periodic trend.

Concept introduction:

Effective nuclear charge increases across a period and IE also increases across the period.

It is more difficult to remove a paired core electron (electron from the inner shells) than an unpaired valence electron.

Ionization energy tends to increase across a period and decreases down the group.

Answer to Problem 1KSP

Correct answer: Option (b).

Explanation of Solution

Reason for correct option:

For the elements, Al and Ga, Ga is below Al in the same group, indicating that Al has a higher ionization enthalpy (IE) than Ga. But Ga has a higher IE than Al because the effective nuclear charge of gallium is slightly higher than that of aluminum.

Hence, option (b) is the correct answer.

Reason for incorrect options:

Option (a) is incorrect because Si is below C in the same group, clearly indicating that C has a higher IE than Si.

Option (c) is incorrect because Ga is below Si but to its left, indicating that Si has a higher IE than Ga.

Option (d) is incorrect because Tl is below Sn but to its left, indicating that Sn has a higher IE than Tl.

Option (e) is incorrect because Si is below B but to its right, indicating that Si has a higher IE than B.

Hence, options(a), (c), (d), and (e) are incorrect.

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Chapter 7 Solutions

Chemistry

Ch. 7.2 - Which of the following equations correctly...Ch. 7.3 - Practice Problem ATTEMPT Referring only to a...Ch. 7.3 - Practice Problem BUILD For which of the following...Ch. 7.3 - Practice Problem CONCEPTUALIZE Based on size and...Ch. 7.4 - Practice Problem ATTEMPT Which element. Mg or Al,...Ch. 7.4 - Prob. 1PPBCh. 7.4 - Practice ProblemCONCEPTUALIZE Imagine an...Ch. 7.4 - 7.4.1 Arrange the elements in order of increasing...Ch. 7.4 - Arrange the elements Li. Be. and B in order of...Ch. 7.4 - For each of the following pairs of elements,...Ch. 7.4 - Prob. 4CPCh. 7.5 - Practice ProblemATTEMPT Would you expect Mg or Al...Ch. 7.5 - Prob. 1PPBCh. 7.5 - Practice ProblemCONCEPTUALIZE In the same...Ch. 7.5 - Prob. 1CPCh. 7.5 - 7.5.2 Which of the following pairs are...Ch. 7.5 - 7.5.3 Select the correct ground-state electron...Ch. 7.5 - Prob. 4CPCh. 7.6 - Practice Problem ATTEMPT Between which two charges...Ch. 7.6 - Practice ProblemBUILD What must the distance be...Ch. 7.6 - Prob. 1PPCCh. 7.6 - Which of the following species are isoelectronic...Ch. 7.6 - Which of the following are arranged correctly in...Ch. 7.6 - 7.6.3 Which of the following is the most realistic...Ch. 7.6 - Which of the following is the most realistic...Ch. 7.7 - Practice Problem ATTEMPT Write electron...Ch. 7.7 - Practice ProblemBUILD List all the species (atoms...Ch. 7.7 - Practice Problem CONCEPTUALIZE Select the correct...Ch. 7.8 - Practice Problem ATTEMPT Write electron...Ch. 7.8 - Practice Problem BUILD What common d-block ion...Ch. 7.8 - Prob. 1PPCCh. 7.9 - Practice ProblemATTEMPT Arrange the following...Ch. 7.9 - Practice Problem BUILD List all the common ions...Ch. 7.9 - Practice ProblemCONCEPTUALIZE Which periodic...Ch. 7 - Often we can compare properties of two elements...Ch. 7 - 7.2 The colored spheres represent the ions Based...Ch. 7 - Group 8A exhibits the highest first ionization...Ch. 7 - Which of the following best describes why Z eff...Ch. 7 - 7.1 Briefly describe the significance of...Ch. 7 - What is Moseley's contribution to the modern...Ch. 7 - 7.3 Describe the general layout of a modern...Ch. 7 - 7.4 What is the most important relationship among...Ch. 7 - Prob. 5QPCh. 7 - Prob. 6QPCh. 7 - Prob. 7QPCh. 7 - 7.8 What is a main group element? Give names and...Ch. 7 - 7.9 Without referring to a periodic table, write...Ch. 7 - Prob. 10QPCh. 7 - You are given a sample of a dark, shiny solid and...Ch. 7 - What are valence electrons? For main group...Ch. 7 - Write the outer electron configurations for the...Ch. 7 - Use the first-row transition metals ( Sc to Cu )...Ch. 7 - Arsenic is not an essential element for the human...Ch. 7 - 7.16 In the periodic table, the element hydrogen...Ch. 7 - 7.17 A neutral atom of a certain element has 34...Ch. 7 - 7.18 Group the following electron configurations...Ch. 7 - Group the following electron configurations in...Ch. 7 - Prob. 20QPCh. 7 - Specify the group of the periodic table in which...Ch. 7 - Prob. 22QPCh. 7 - Explain why the atomic radius of Be is smaller...Ch. 7 - The electron configuration of B is 1 S 2 2 S 2 2 P...Ch. 7 - 7 25 The electron configuration of C is . (a) If...Ch. 7 - Define atomic radius. Does the size of an atom...Ch. 7 - How does atomic radius change (a) from left to...Ch. 7 - Prob. 28QPCh. 7 - Sketch the outline of the periodic table, and show...Ch. 7 - Prob. 30QPCh. 7 - Explain the trends in electron affinity from...Ch. 7 - A hydrogen-like ion is an ion containing only one...Ch. 7 - Prob. 33QPCh. 7 - On the basis of their positions in the periodic...Ch. 7 - 7.35 Arrange the following atoms in order of...Ch. 7 - 7.36 Which is the largest atom in the third period...Ch. 7 - Which is the smallest atom in Group 7A ?Ch. 7 - Based on size, identify the spheres shown as Na,...Ch. 7 - Based on size, identify the spheres shown as K,...Ch. 7 - Why is the radius of the lithium atom considerably...Ch. 7 - Use the second period of the periodic table as an...Ch. 7 - Arrange the following in order of increasing first...Ch. 7 - Arrange the following in order of increasing first...Ch. 7 - 7.44 Use the third period of the periodic table as...Ch. 7 - In general, the first ionization energy increases...Ch. 7 - Prob. 46QPCh. 7 - 7.47 Two atoms have the electron configurations ....Ch. 7 - Prob. 48QPCh. 7 - Specify which of the following elements you would...Ch. 7 - Considering their electron affinities, do you...Ch. 7 - Explain why alkali metals have a greater affinity...Ch. 7 - 7.52 How does the electron configuration of ions...Ch. 7 - 7.53 What do we mean when we say that two ions or...Ch. 7 - Prob. 54QPCh. 7 - Give three examples of first-row transition metal...Ch. 7 - A M 2+ ion derived from a metal in the first...Ch. 7 - A metal ion with a net +3 charge has five...Ch. 7 - Prob. 58QPCh. 7 - 7.59 Group the species that are isoelectronic: . Ch. 7 - 7.60 Write the ground-state electron...Ch. 7 - Prob. 61QPCh. 7 - 7.62 Which of the following species are...Ch. 7 - Prob. 63QPCh. 7 - Prob. 64QPCh. 7 - Indicate which one of the two species in each of...Ch. 7 - Prob. 66QPCh. 7 - Prob. 67QPCh. 7 - Prob. 68QPCh. 7 - Prob. 69QPCh. 7 - Prob. 70QPCh. 7 - Prob. 71QPCh. 7 - Prob. 72QPCh. 7 - Prob. 73QPCh. 7 - Prob. 74QPCh. 7 - Prob. 75QPCh. 7 - Prob. 76QPCh. 7 - Prob. 77QPCh. 7 - Prob. 78QPCh. 7 - 7 79 Write balanced equations for the reactions...Ch. 7 - Write formulas for and name the binary hydrogen...Ch. 7 - Prob. 81QPCh. 7 - Prob. 82APCh. 7 - Prob. 83APCh. 7 - Write equations representing the following...Ch. 7 - Prob. 85APCh. 7 - Write the empirical (or molecular) formulas of...Ch. 7 - 7.87 Arrange the following species in...Ch. 7 - In which of the following are the species written...Ch. 7 - Which of the following properties show a clear...Ch. 7 - Prob. 90APCh. 7 - Prob. 91APCh. 7 - 7.92 For each pair of elements listed, give three...Ch. 7 - What is the most reactive element on the periodic...Ch. 7 - Explain why the first electron affinity of sulfur...Ch. 7 - Prob. 95APCh. 7 - 7.96 Predict the products of the following oxides...Ch. 7 - 7.97 write the formulas and names of the oxides of...Ch. 7 - Prob. 98APCh. 7 - The formula for calculating the energies of an...Ch. 7 - 7.100 Why do noble gases have negative electron...Ch. 7 - 7.101 The atomic radius of K is 227 pm and that of...Ch. 7 - 7.102 The atomic radius of F is 72 pm and that of ...Ch. 7 - Match each of the elements on the right with its...Ch. 7 - Prob. 104APCh. 7 - Prob. 105APCh. 7 - Prob. 106APCh. 7 - Prob. 107APCh. 7 - Explain, in terms of their electron...Ch. 7 - 7.109 Write the formulas and names of the hydrides...Ch. 7 - Prob. 110APCh. 7 - Prob. 111APCh. 7 - Prob. 112APCh. 7 - Most transition metal ions are colored. For...Ch. 7 - Prob. 114APCh. 7 - Prob. 115APCh. 7 - Prob. 116APCh. 7 - 7.117 Although it is possible to determine the...Ch. 7 - Prob. 118APCh. 7 - Prob. 119APCh. 7 - Predict the atomic number and ground-state...Ch. 7 - Prob. 121APCh. 7 - 7.122 Match each of the elements on the right with...Ch. 7 - One way to estimate the effective charge ( Z eff )...Ch. 7 - Use your knowledge of thermochemistry to calculate...Ch. 7 - Prob. 125APCh. 7 - 7.126 On one graph, plot the effective nuclear...Ch. 7 - 7.127 One allotropic form of an element X is a...Ch. 7 - 7.128 Calculate the maximum wavelength of light...Ch. 7 - Prob. 129APCh. 7 - Element M is a shiny and highly reactive metal (...Ch. 7 - Write the ground-state electron configurations of...Ch. 7 - Thallium (Tl) is a neurotoxin and exists mostly in...Ch. 7 - Both Mg 2+ and Ca 2+ are important biological...Ch. 7 - Prob. 134APCh. 7 - Prob. 135APCh. 7 - Prob. 136APCh. 7 - Prob. 137APCh. 7 - 7.138 The ionization energy of a certain element...Ch. 7 - 7.139 Experimentally, the electron affinity of an...Ch. 7 - A halogen has valence electrons in which orbitals?...Ch. 7 - Prob. 2SEPPCh. 7 - Prob. 3SEPPCh. 7 - Prob. 4SEPP
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