Chemistry: Principles and Reactions
8th Edition
ISBN: 9781305079373
Author: William L. Masterton, Cecile N. Hurley
Publisher: Cengage Learning
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Textbook Question
Chapter 6, Problem 43QAP
Write the symbol of
(a) all the elements in which all the 4d orbitals are half-full.
(b) all the nonmetals in period 2 that have 2 or more unpaired electrons.
(c) all the elements in group 2 in which the 4p sublevel is full.
(d) all the metalloids that have unpaired 5p electrons.
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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?
What is meant by the ground state of an atom?
(a) All of the quantum numbers have their lowest values
(n = 1, l = m = 0).
(b) The principal quantum number of the electrons in the
outer shell is 1.
(c) All of the electrons are in the lowest energy state,
consistent with the exclusion principle.
(d) The electrons are in the lowest state allowed by the
uncertainty principle.
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) 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?
Chapter 6 Solutions
Chemistry: Principles and Reactions
Ch. 6 - A photon of violet light has a wavelength of 423...Ch. 6 - Most retinal tears and detachments are treated by...Ch. 6 - A line in the spectrum of neon has a wavelength of...Ch. 6 - Ozone absorbs energy with a frequency of 1.291015...Ch. 6 - The ionization energy of rubidium is 403 kJ/mol....Ch. 6 - Energy from radiation can cause chemical bonds to...Ch. 6 - Lasers are now used for the total or partial...Ch. 6 - Your instructor may use a laser pointer while...Ch. 6 - Consider the transition from the energy levels n=5...Ch. 6 - Consider the transition from the energy levels n=2...
Ch. 6 - According to the Bohr model, the radius of a...Ch. 6 - Calculate En for n=1,2,3, and 4 (R H=2.1801018J)....Ch. 6 - For the Pfund series, nlo=5. (a) Calculate the...Ch. 6 - In the Brackett series, nlo=4. (a) Calculate the...Ch. 6 - A line in the Lyman series (nlo=1) occurs at 97.23...Ch. 6 - In the Pfund series, nlo=5. Calculate the longest...Ch. 6 - What are the possible values for m l for (a) the d...Ch. 6 - What are the possible values for m l for (a) the d...Ch. 6 - For the following pairs of orbitals, indicate...Ch. 6 - For the following pairs of orbitals, indicate...Ch. 6 - What type of electron orbital (i.e., s, p, d, or...Ch. 6 - What type of electron orbital (i.e., s, p, d, or...Ch. 6 - What is the total electron capacity for (a)...Ch. 6 - Give the number of orbitals in (a) n=3(b) a 4p...Ch. 6 - How many electrons in an atom can following...Ch. 6 - How many electrons in an atom can have the...Ch. 6 - Given the following sets of quantum numbers,...Ch. 6 - Given the following sets of electron quantum...Ch. 6 - Write the ground state electron configuration for...Ch. 6 - Write the ground state electron configuration for...Ch. 6 - Write an abbreviated ground state electron...Ch. 6 - Prob. 32QAPCh. 6 - Give the symbol of the element of lowest atomic...Ch. 6 - Give the symbol of the element of lowest atomic...Ch. 6 - What fraction of the total number of electrons is...Ch. 6 - What fraction of the total number of electrons is...Ch. 6 - Which of the following electron configurations...Ch. 6 - Which of the following electron configurations...Ch. 6 - Write the orbital diagram for (a) Li(b) P(c) F(d)...Ch. 6 - Write the orbital diagram tor an atom of (a) Na...Ch. 6 - Give the symbol of the atom with the following...Ch. 6 - What is the symbol of the atom with the following...Ch. 6 - Write the symbol of (a) all the elements in which...Ch. 6 - Write the symbols of (a) all the elements in...Ch. 6 - How many unpaired electrons are there in an atom...Ch. 6 - How many unpaired electrons are there in the...Ch. 6 - In what main group(s) of the periodic table do...Ch. 6 - Give the symbol of the main-group metals in period...Ch. 6 - Write the ground state electron configuration for...Ch. 6 - Write the ground state electron configuration for...Ch. 6 - How many unpaired electrons are there 111 the...Ch. 6 - How many unpaired electrons are there in the...Ch. 6 - Arrange the elements Na, Si, and S in the order of...Ch. 6 - Arrange the elements Mg, S, and Cl in order of (a)...Ch. 6 - Which of the four atoms Rb, Sr, Sb, or Cs (a) has...Ch. 6 - Which of the four atoms Na, P, Cl, or K (a) has...Ch. 6 - Select the larger member of each pair. (a) Ca and...Ch. 6 - Select the smaller member of each pair. (a) P and...Ch. 6 - Prob. 59QAPCh. 6 - Prob. 60QAPCh. 6 - A lightbulb radiates 8.5% of the energy supplied...Ch. 6 - The speed of a computer chip is measured by its...Ch. 6 - A carbon dioxide laser produces radiation of...Ch. 6 - Name and give the symbol of the element that has...Ch. 6 - Compare the energies and frequencies of two...Ch. 6 - Consider the following transitions 1. n=3 to n=1...Ch. 6 - Write the symbol of each element described below....Ch. 6 - Answer the following questions. (a) What...Ch. 6 - Explain in your own words what is meant by (a) the...Ch. 6 - Explain the difference between (a) the Bohr model...Ch. 6 - Indicate whether each of the following statements...Ch. 6 - Criticize or comment on the following statements:...Ch. 6 - No currently known elements contain electrons in g...Ch. 6 - Prob. 74QAPCh. 6 - Explain why (a) negative ions are larger than...Ch. 6 - The energy of any one-electron species in its nth...Ch. 6 - In 1885, Johann Balmer, a mathematician, derived...Ch. 6 - Prob. 78QAPCh. 6 - Suppose that the spin quantum number could have...Ch. 6 - In the photoelectric effect, electrons are ejected...
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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
- What is the radius, in angstroms, of the orbital of an electron with n = 8 in a hydrogen atom?arrow_forward(a) Why do successive IEs of a given element always increase? (b) When the difference between successive IEs of a given element is exceptionally large (for example, between IE1 and IE2 of K), what do we learn about its electron configuration? (c) The bars represent the relative magnitudes of the first five ionization energies of an atom: Identify the element and write its complete electron config uration, assuming it comes from (a) Period 2; (b) Period 3; (c) Period 4.arrow_forward(a) Write out the full electron configuration of Calcium (Ca). (b) How many electrons are in the n=3 shell of Calcium?arrow_forward
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