Introductory Chemistry: An Active Learning Approach
6th Edition
ISBN: 9781305079250
Author: Mark S. Cracolice, Ed Peters
Publisher: Cengage Learning
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Chapter 11, Problem 78E
Which of the following describes the element
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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.
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?
An element has the following electronic configuration: [Kr]4d105s25p2(a) What period does it belong to?(b) What is its group number? (Use group numbers from 1 to 18)(c) What kind of element is it? (Main group metal, transition metal, metalloid, nonmetal?)(d) How many unpaired electrons are there in an atom of this element?
Chapter 11 Solutions
Introductory Chemistry: An Active Learning Approach
Ch. 11 - Prob. 1ECh. 11 - Prob. 2ECh. 11 - Identify measurable wave properties that are used...Ch. 11 - Prob. 4ECh. 11 - Which among the following are not quantized? a...Ch. 11 - Which of the following are quantized? a canned...Ch. 11 - Prob. 7ECh. 11 - In the Bohr model of the hydrogen atom, the...Ch. 11 - Prob. 9ECh. 11 - Prob. 10E
Ch. 11 - Prob. 11ECh. 11 - Prob. 12ECh. 11 - Prob. 13ECh. 11 - Prob. 14ECh. 11 - Prob. 15ECh. 11 - Prob. 16ECh. 11 - Prob. 17ECh. 11 - Prob. 18ECh. 11 - Prob. 19ECh. 11 - How many sublevels are there in an atom with n=4?Ch. 11 - Prob. 21ECh. 11 - Prob. 22ECh. 11 - Prob. 23ECh. 11 - Prob. 24ECh. 11 - The principal energy level with n=6 contains six...Ch. 11 - Although we may draw the 4s orbital with the shape...Ch. 11 - Prob. 27ECh. 11 - Prob. 28ECh. 11 - Prob. 29ECh. 11 - Prob. 30ECh. 11 - Prob. 31ECh. 11 - Prob. 32ECh. 11 - Prob. 33ECh. 11 - Prob. 34ECh. 11 - Prob. 35ECh. 11 - Is the quantum mechanical model of the atom...Ch. 11 - Prob. 37ECh. 11 - Prob. 38ECh. 11 - What element has the electron configuration...Ch. 11 - Prob. 40ECh. 11 - Prob. 41ECh. 11 - What is meant by [Ne] in [Ne]3s23p1?Ch. 11 - Prob. 43ECh. 11 - Prob. 44ECh. 11 - Prob. 45ECh. 11 - Prob. 46ECh. 11 - Prob. 47ECh. 11 - Prob. 48ECh. 11 - Prob. 49ECh. 11 - Prob. 50ECh. 11 - Prob. 51ECh. 11 - Prob. 52ECh. 11 - Use a noble gas core to write the electron...Ch. 11 - a Write the complete ground state electron...Ch. 11 - 55. Why are valence electrons important?Ch. 11 - Prob. 56ECh. 11 - Prob. 57ECh. 11 - Prob. 58ECh. 11 - Prob. 59ECh. 11 - Prob. 60ECh. 11 - Prob. 61ECh. 11 - . Using only the periodic table, arrange the...Ch. 11 - Prob. 63ECh. 11 - Prob. 64ECh. 11 - Prob. 65ECh. 11 - Prob. 66ECh. 11 - Prob. 67ECh. 11 - Using only the periodic table, arrange the...Ch. 11 - Prob. 69ECh. 11 - Using only the periodic table, arrange the...Ch. 11 - Prob. 71ECh. 11 - Give the symbol for an element that is: a a...Ch. 11 - Prob. 73ECh. 11 - a What is the name of the alkali metal that is in...Ch. 11 - Prob. 75ECh. 11 - Which of the following describes the element Ba?...Ch. 11 - Prob. 77ECh. 11 - Which of the following describes the element Br?...Ch. 11 - Prob. 79ECh. 11 - Prob. 80ECh. 11 - Prob. 81ECh. 11 - Prob. 82ECh. 11 - Prob. 83ECh. 11 - Prob. 84ECh. 11 - Prob. 85ECh. 11 - Prob. 86ECh. 11 - Prob. 87ECh. 11 - Prob. 88ECh. 11 - Prob. 89ECh. 11 - Prob. 90ECh. 11 - Prob. 91ECh. 11 - Determine whether each statement that follows is...Ch. 11 - Prob. 93ECh. 11 - Prob. 94ECh. 11 - Prob. 95ECh. 11 - Prob. 96ECh. 11 - Prob. 97ECh. 11 - Prob. 98ECh. 11 - Prob. 99ECh. 11 - Prob. 100ECh. 11 - Prob. 101ECh. 11 - Prob. 102ECh. 11 - Prob. 103ECh. 11 - Prob. 104ECh. 11 - Prob. 105ECh. 11 - Prob. 106ECh. 11 - Prob. 107ECh. 11 - Prob. 108ECh. 11 - Prob. 109ECh. 11 - Prob. 11.1TCCh. 11 - Prob. 11.2TCCh. 11 - Prob. 11.3TCCh. 11 - Prob. 11.4TCCh. 11 - Prob. 11.5TCCh. 11 - Prob. 1CLECh. 11 - Prob. 2CLECh. 11 - Prob. 3CLECh. 11 - Prob. 4CLECh. 11 - Prob. 5CLECh. 11 - Prob. 6CLECh. 11 - Prob. 7CLECh. 11 - Prob. 8CLECh. 11 - Prob. 9CLECh. 11 - Write the electron configuration of the highest...Ch. 11 - Prob. 2PECh. 11 - Prob. 3PECh. 11 - Prob. 4PECh. 11 - Prob. 5PECh. 11 - Prob. 6PECh. 11 - Prob. 7PE
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- 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_forwardTwo 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_forward(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.arrow_forward
- Arrange in order of increasing atomic size. (a) the period 3 elements Cl, Na, and Ar (b) the Group 2A elements Ca, Be, and Mgarrow_forwardQ1. This question is about atomic structure. (a) Write the full electron configuration for each of the following species. CH Fe2+ (b) Write an equation, including state symbols, to represent the process that occurs when the third ionisation energy of manganese is measured. (c) State which of the elements magnesium and aluminium has the lower first ionisation energy Explain your answer. (d) A sample of nickel was analysed in a time of flight (TOF) mass spectrometer. The sample was ionised by electron impact ionisation. The spectrum produced showed three peaks with abundances as set out in the table. m/z Abundance /% 58 61.0 60 29.1 61 9.9 Give the symbol, including mass number, of the ion that would reach the detector first in the sample. Calculate the relative atomic mass of the nickel in the sample. Give your answer to one decimal place. Page 2 of 12 Symbol of ion Relative atomic massarrow_forward(a) Identify the number of electrons in the ground-state outer shell of atomic oxygen (atomic number 8).(b) How many electrons are in the ground-state outer shell of fluorine?arrow_forward
- 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?arrow_forwardArrange in order of increasing nonmetallic character. (Use the appropriate <, =, or > symbol to separate substances in the list.) (a) the Period 4 elements V, Ge, and K (b) the Group 5A elements N, As, and Bi Arrange in order of increasing atomic size. (Use the appropriate <, =, or > symbol to separate substances in the list.) (a) the Period 3 elements Mg, Si, and Ar (b) the Group 2A elements Ca, Ba, and Srarrow_forwardArrange in order of increasing ionization energy. (a) the Group 1A elements H, Li, and Cs (b) the Period 4 elements As, K, & Searrow_forward
- Give the shell electron configuration for the following. (For example, the shell electron configuration of lithium is written 2,1.) (a) argon (b) magnesiumarrow_forwardBefore Mendeleev published his periodic table, Döbereiner grouped elements with similar properties into “triads,” in whichthe unknown properties of one member could be predicted byaveraging known values of the properties of the others. To test this idea, predict the values of the following quantities:(a) The atomic mass of K from the atomic masses of Na and Rb(b) The melting point of Br₂ from the melting points of Cl₂(-101.0°C) and I₂(113.6°C) (actual value -7.2°C)arrow_forwardQ2. 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.arrow_forward
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