General Chemistry: Principles and Modern Applications (11th Edition)
11th Edition
ISBN: 9780132931281
Author: Ralph H. Petrucci, F. Geoffrey Herring, Jeffry D. Madura, Carey Bissonnette
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 71SAE
Briefly describe each of the following ideas or phenomena. (a) the periodic law; (b) ionization energy; (c)
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(a) Rank elements: Na, Mg, Al, and K, in increasing order of: (i) atomic size; (ii) ionization energy, and (iii) reactivity. (b) Explain why atomic size decreases from left to right, but increases from top to bottom; (c) Explain why ionization energy increases from left to right, but decreases from top to bottom; (d) Explain why the reactivity of alkali metals (Group-1) increases from top to bottom, where as the reactivity of halogen (Group-17) decreases from top to bottom.
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?
In the table below, I1 – I6 represent first 6 ionization energies of a certain element. All units are kJ/mol.
I1 I2 I3 I4 I5 I6
738 1450 7730 10500 13600 18000
This element is in the 3rd row of the periodic table, the row starting with Na. Identify the element, and explain your reasoning, based on the data in the above table.
Chapter 9 Solutions
General Chemistry: Principles and Modern Applications (11th Edition)
Ch. 9 - Prob. 1ECh. 9 - Suppose that lanthanum (Z = 57) were a newly...Ch. 9 - The following densities, in grams per cubic...Ch. 9 - The blowing melting points are in degrees Celsius....Ch. 9 - Mendeleev's periodic table did not preclude the...Ch. 9 - Prob. 6ECh. 9 - Prob. 7ECh. 9 - Concerning the incomplete seventh period of the...Ch. 9 - For each of the following pairs, indicate the atom...Ch. 9 - Indicate the smallest and the largest species...
Ch. 9 - Explain why the radii of atoms do not simply...Ch. 9 - The masses of individual atoms can be determined...Ch. 9 - Which is (a) the smallest atom in group 13; (b)...Ch. 9 - How would you expect the sizes of the hydrogen...Ch. 9 - Prob. 15ECh. 9 - Explain why the generalizations presented in...Ch. 9 - Among the following ions, several pairs are...Ch. 9 - Prob. 18ECh. 9 - All the isoelectronic species illustrated in the...Ch. 9 - Prob. 20ECh. 9 - Use principles established in this chapter to...Ch. 9 - Are there any atoms for which the second...Ch. 9 - Some electron affinities are negative quantities,...Ch. 9 - How much energy, in pules, must be absorbed to...Ch. 9 - How much energy, in kilojoules, is required to...Ch. 9 - Prob. 26ECh. 9 - The production of gaseous bromide ions from...Ch. 9 - Use ionization energies and electron affinities...Ch. 9 - The Naa ion and the Ne atom are isoelectronic. The...Ch. 9 - Prob. 30ECh. 9 - Compare the elements Al, Si, S, and Cl. a. Place...Ch. 9 - Compare the elements Na, Mg, O, and P. a. Place...Ch. 9 - Unpaired electrons are found in only one of the...Ch. 9 - Which of the following species has the greatest...Ch. 9 - Which of the following species would you expect to...Ch. 9 - Write electron configurations consistent with the...Ch. 9 - Must all atoms with an odd atomic number be...Ch. 9 - Neither Co24 nor Co24 has 4s electrons in its...Ch. 9 - Use ideas presented in this chapter to indicate...Ch. 9 - Arrange the following atoms in order of increasing...Ch. 9 - Arrange the following species in order of...Ch. 9 - For the following groups of elements, select the...Ch. 9 - Prob. 43ECh. 9 - Of the species Naa, Na, F, and F-, which has the...Ch. 9 - Match each of the lettered items on the left with...Ch. 9 - Prob. 46ECh. 9 - Which of the following ions are unlikely to be...Ch. 9 - Which of the following ions are likely to be found...Ch. 9 - Four atoms and/or ions are sketched below in...Ch. 9 - Prob. 50IAECh. 9 - In Mendeleev's time, indium oxide, which is 82.5%...Ch. 9 - Instead of accepting the atomic mass of indium...Ch. 9 - Refer to Figure 9-11 and explain why the...Ch. 9 - Explain why the third ionization energy of Li(g)...Ch. 9 - Prob. 55IAECh. 9 - Prob. 56IAECh. 9 - Studies done in 1880 showed that a chloride of...Ch. 9 - Assume that atoms are herd spheres, and use the...Ch. 9 - When sodium chloride is strongly heated in a...Ch. 9 - Use information from Chapters 8 and 9 to calculate...Ch. 9 - Refer only to the periodic table on the inside...Ch. 9 - Refer to the footnote on page 393. Then use values...Ch. 9 - Prob. 63IAECh. 9 - Prob. 64IAECh. 9 - The work functions for a number of metals are...Ch. 9 - The following are a few elements and their...Ch. 9 - Gaseous sodium atoms absorb quanta with the...Ch. 9 - A method for estimating electron affinities is to...Ch. 9 - We have seen that the wave functions of...Ch. 9 - In your own words, define the following terms (a)...Ch. 9 - Briefly describe each of the following ideas or...Ch. 9 - Explain the important distinctions between each...Ch. 9 - Prob. 73SAECh. 9 - Prob. 74SAECh. 9 - Prob. 75SAECh. 9 - Prob. 76SAECh. 9 - Prob. 77SAECh. 9 - An ion that is isoelectronic with Se2- is (a) S2-...Ch. 9 - Write electron configurations to show the first...Ch. 9 - Explain why the first ionization energy of Mg is...Ch. 9 - Prob. 81SAECh. 9 - Prob. 82SAECh. 9 - Find three pairs of elements that are out of order...Ch. 9 - Prob. 84SAECh. 9 - Prob. 85SAECh. 9 - Prob. 86SAECh. 9 - Prob. 87SAECh. 9 - Prob. 88SAECh. 9 - In multielectron atoms many of the periodic trends...Ch. 9 - Consider a nitrogen atom in the ground state and...Ch. 9 - Prob. 91SAECh. 9 - Describe how the ionization energies of the ions...Ch. 9 - Prob. 93SAECh. 9 - Prob. 94SAECh. 9 - When compared to a nonmetal of the same period, a...Ch. 9 - Prob. 96SAECh. 9 - Which of the following has a smaller radius than a...Ch. 9 - Prob. 98SAECh. 9 - The electrons lost when Fe ionizes to Fe2- are (a)...Ch. 9 - Prob. 100SAE
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Does the information on alkali metals in Table 2-8 of the text confirm the general periodic trends in ionization energy and atomic radius? Explain.arrow_forward6.82 A particular element has the following values for its first four ionization energies: 900, 1760, 14, 850, and 21,000 kJ/mol. Without consulting a list of ionization energy values, determine what group in the periodic table this element belongs in.arrow_forwardConsider the eight most abundant elements in the human body, as outlined in Exercise 156. Excluding hydrogen, which of these elements would have the smallest size? largest size? smallest first ionization energy? largest first ionization energy?arrow_forward
- Two elements are in the same group, one following the other. One is a metalloid; the other is a metal. Both form oxides of the formula RO2. The first is acidic; the next is amphoteric. Identify the two elements.arrow_forwardIn one area of Australia, the cattle did not thrive despite the presence of suitable forage. An investigation showed the cause to be the absence of sufficient cobalt in the soil. Cobalt forms cations in two oxidation states, Co2 and Co3+. Write the electron structure of the two cations.arrow_forwardBoron, 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) Drawthe orbital diagram for an atom of 11B. Which electrons are the valence electrons? (c) Indicate three ways in which the 1s electrons inboron differ from its 2s electrons. (d) Elemental boron reacts with fluorine to form BF3, a gas. Write a balanced chemical equation forthe reaction of solid boron with fluorine gas. (e) ΔHf° for BF31g2 is -1135.6 kJ>mol. Calculate the standard enthalpy change in thereaction 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?arrow_forward
- Consider the general valence electron configuration of ns2np5 and the following statements:(i) Elements with this electron configuration are expected to form -1 anions.(ii) Elements with this electron configuration are expected to have large positive electron affinities.(iii) Elements with this electron configuration are nonmetals.(iv) Elements with this electron configuration form acidic oxides. Which statements are true? Consider the general valence electron configuration of ns2np5 and the following statements:(i) Elements with this electron configuration are expected to form -1 anions.(ii) Elements with this electron configuration are expected to have large positive electron affinities.(iii) Elements with this electron configuration are nonmetals.(iv) Elements with this electron configuration form acidic oxides.Which statements are true? (i), (iii,) and (iv) (ii) and (iii) (i), (ii), and (iii) (i) and (ii) All statements are true.arrow_forwardKnowing that atomic radius and ionization energy are two important properties of an atom that are periodic in nature. First, (i) define the term ionization energy. Then, (ii) state the directions along the periodic table (up, down, left, right) that a) atomic radius and b) ionization energy increase and (iii) explain the factors that lead to each of these trends.arrow_forward4. As you move across the periodic table, from left to right, (A) do the atoms get smaller or larger? (B) are the ionization energies increasing or decreasing? (C) are the metals becoming more or less reactive?arrow_forward
- (a) Describe the trends of atomic size and ionization energy, respectively, in the Periodic Table: (1) from left to right across a period, and (ii) from top to bottom down a group. (b) Rank the following elements: Na, Mg, Al, and K, in increasing order of: (i) atomic size; (ii) ionization energy, and (iii) reactivity. (c) Rank the following elements: F, CI, Br and I, in increasing order of: (i) atomic size; (ii) electron affinity, (iii) electronegativity, and (iv) reactivity.arrow_forwardUsing only their location in the periodic table, rank the atoms in each set by decreasing atomic size. Explain your answers. (a) Mg, Be, Ba (b) Se, Br, Cl (c) Ca, Se, Gaarrow_forward
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