Basic Chemistry (5th Edition)
5th Edition
ISBN: 9780134138046
Author: Karen C. Timberlake
Publisher: PEARSON
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Textbook Question
Chapter 5.6, Problem 5.51QAP
What do the group numbers from 1A (1) to 8A (18) for the elements indicate about electron configurations of those elements?
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Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of 19.9% and 80.1%, respectively.
(a) In what ways do the two isotopes differ from each other? Does the electronic configuration of 10B differ from that of 11B?
(b) Draw the orbital diagram for an atom of 11B. Which electrons are the valence electrons?
(c) Indicate three ways in which the 1s electrons in boron differ from its 2s electrons.
(d) Elemental boron reacts with fluorine to form BF3, a gas. Write a balanced chemical equation for the reaction of solid boron with fluorine gas.
(e) ΔHf° for BF3(g) is -1135.6 kj/mol. Calculate the standard enthalpy change in the reaction of boron with fluorine.
(f) Will the mass percentage of F be the same in 10BF3 and 11BF3? If not, why is that the case?
15.
(a)
b)
Identify the element that is described by the following information. Refer to a
periodic table if necessary.
It is a group 14 (III A) metalloid in the 3rd period.
It is a group 15 (VA) metalloid in the 5th period.
It is the other metalloid in group 15 (VA).
d)
It is a halogen that exists in the liquid state at room temperature.
16.
What is the relationship between electron arrangement and the organization of
elements in the periodic table?
Q2.
This question is about the periodicity of the Period 3 elements.
(a)
State and explain the general trend in first ionisation energy across Period 3.
Give one example of an element which deviates from the general trend in first
(b)
ionisation energy across Period 3.
Explain why this deviation occurs.
Page 3 of 12
(c) The table shows successive ionisation energies of an element Y in Period 3.
lonisation number
1
2
3
4
5
6
7
8
lonisation energy
kJ mol-
1000
2260
3390
4540
6990
8490
27 100 31 700
Identify element Y
Explain your answer using data from the table.
(d)
Identify the Period 3 element that has the highest melting point.
Explain your answer by reference to structure and bonding.
Chapter 5 Solutions
Basic Chemistry (5th Edition)
Ch. 5.1 - What is meant by the wavelength of UV light?Ch. 5.1 - How are the wavelength and frequency of light...Ch. 5.1 - What is the difference between “white” light and...Ch. 5.1 - Prob. 5.4QAPCh. 5.1 - Prob. 5.5QAPCh. 5.1 - AM radio waves have a frequency of 8105s-1 ....Ch. 5.1 - Prob. 5.7QAPCh. 5.1 - Prob. 5.8QAPCh. 5.1 - Which ty pe of electromagnetic radiation, cell...Ch. 5.1 - Prob. 5.10QAP
Ch. 5.1 - Prob. 5.11QAPCh. 5.1 - Prob. 5.12QAPCh. 5.1 - Place the following types of electromagnetic...Ch. 5.1 - Prob. 5.14QAPCh. 5.2 - What feature of an atomic spectrum indicates that...Ch. 5.2 - Prob. 5.16QAPCh. 5.2 - Prob. 5.17QAPCh. 5.2 - Prob. 5.18QAPCh. 5.2 - Prob. 5.19QAPCh. 5.2 - Identify the photon in each pair with the greater...Ch. 5.3 - Describe the shape of each of the following...Ch. 5.3 - Prob. 5.22QAPCh. 5.3 - Prob. 5.23QAPCh. 5.3 - Prob. 5.24QAPCh. 5.3 - Prob. 5.25QAPCh. 5.3 - Prob. 5.26QAPCh. 5.3 - Prob. 5.27QAPCh. 5.3 - Prob. 5.28QAPCh. 5.4 - Compare the terms electron configuration and...Ch. 5.4 - Prob. 5.30QAPCh. 5.4 - 5.31 Draw the orbital diagram for each of the...Ch. 5.4 - 5.32 Draw the orbital diagram for each of the...Ch. 5.4 - Prob. 5.33QAPCh. 5.4 - Prob. 5.34QAPCh. 5.4 - Prob. 5.35QAPCh. 5.4 - Prob. 5.36QAPCh. 5.4 - Prob. 5.37QAPCh. 5.4 - Prob. 5.38QAPCh. 5.4 - Prob. 5.39QAPCh. 5.4 - Prob. 5.40QAPCh. 5.5 - Use the sublevel blocks on the periodic table to...Ch. 5.5 - Prob. 5.42QAPCh. 5.5 - Prob. 5.43QAPCh. 5.5 - Prob. 5.44QAPCh. 5.5 - Prob. 5.45QAPCh. 5.5 - Prob. 5.46QAPCh. 5.5 - Use the periodic table to give the symbol of the...Ch. 5.5 - Prob. 5.48QAPCh. 5.5 - Prob. 5.49QAPCh. 5.5 - Use the periodic table to give the number of...Ch. 5.6 - What do the group numbers from 1A (1) to 8A (18)...Ch. 5.6 - Prob. 5.52QAPCh. 5.6 - Write the group number using both A/B and 1 to 18...Ch. 5.6 - Prob. 5.54QAPCh. 5.6 - Prob. 5.55QAPCh. 5.6 - Prob. 5.56QAPCh. 5.6 - Prob. 5.57QAPCh. 5.6 - Indicate the number of valence electrons in each...Ch. 5.6 - Write the group number and draw the Lewis symbol...Ch. 5.6 - Prob. 5.60QAPCh. 5.6 - Prob. 5.61QAPCh. 5.6 - Prob. 5.62QAPCh. 5.6 - Prob. 5.63QAPCh. 5.6 - Prob. 5.64QAPCh. 5.6 - Prob. 5.65QAPCh. 5.6 - Prob. 5.66QAPCh. 5.6 - Prob. 5.67QAPCh. 5.6 - Prob. 5.68QAPCh. 5.6 - Prob. 5.69QAPCh. 5.6 - Prob. 5.70QAPCh. 5.6 - Prob. 5.71QAPCh. 5.6 - Fill in each of the following blanks using higher...Ch. 5.6 - Prob. 5.73QAPCh. 5.6 - Prob. 5.74QAPCh. 5.6 - Prob. 5.75QAPCh. 5.6 - Prob. 5.76QAPCh. 5 - Prob. 5.77FUCh. 5 - Prob. 5.78FUCh. 5 - Prob. 5.79UTCCh. 5 - Prob. 5.80UTCCh. 5 - Prob. 5.81UTCCh. 5 - Prob. 5.82UTCCh. 5 - Prob. 5.83UTCCh. 5 - Prob. 5.84UTCCh. 5 - Prob. 5.85UTCCh. 5 - Prob. 5.86UTCCh. 5 - Prob. 5.87AQAPCh. 5 - Prob. 5.88AQAPCh. 5 - Prob. 5.89AQAPCh. 5 - Prob. 5.90AQAPCh. 5 - Prob. 5.91AQAPCh. 5 - Prob. 5.92AQAPCh. 5 - 5.93 a. What electron sublevel starts to fill...Ch. 5 - Prob. 5.94AQAPCh. 5 - Prob. 5.95AQAPCh. 5 - Prob. 5.96AQAPCh. 5 - Prob. 5.97AQAPCh. 5 - Prob. 5.98AQAPCh. 5 - Prob. 5.99AQAPCh. 5 - Prob. 5.100AQAPCh. 5 - Prob. 5.101AQAPCh. 5 - Prob. 5.102AQAPCh. 5 - Prob. 5.103AQAPCh. 5 - Why is the ionization energy of Br lower than that...Ch. 5 - Prob. 5.105AQAPCh. 5 - Prob. 5.106AQAPCh. 5 - Prob. 5.107AQAPCh. 5 - Prob. 5.108AQAPCh. 5 - Prob. 5.109AQAPCh. 5 - Prob. 5.110AQAPCh. 5 - Prob. 5.111AQAPCh. 5 - Prob. 5.112AQAPCh. 5 - Prob. 5.113CQCh. 5 - Prob. 5.114CQCh. 5 - Prob. 5.115CQCh. 5 - Prob. 5.116CQCh. 5 - Prob. 5.117CQCh. 5 - Prob. 5.118CQCh. 5 - Prob. 5.119CQCh. 5 - Prob. 5.120CQ
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