Chemistry for Engineering Students
4th Edition
ISBN: 9781337398909
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
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Chapter 2, Problem 2.23PAE
(a)
Interpretation Introduction
To determine: The number of protons and electrons present in
(b)
Interpretation Introduction
To determine: The number of protons and electrons present in
(c)
Interpretation Introduction
To determine: The number of protons and electrons present in
(d)
Interpretation Introduction
To determine: The number of protons and electrons present in
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Provide the symbol of the following monatomic ions, given the number of protons and electrons in each.
(a) 8 protons, 10 electrons
(b) 20 protons, 18 electrons
(c) 53 protons, 54 electrons
(d) 26 protons, 24 electrons
1. Using the various group classifications from the periodic table, assign all appropriate labels to each of the following elements. Each element will have multiple (2 or more) answers.
(a) Silver
(b) Tennessine
(c) Samarium
(d) Antimony
2. Calculate the numbers of each type of nucleon and the number of electrons in each of the following species.
(a) neodymium-149
(b) tantalum-179
(c) sellenium-79 dianion
(d) krypton-85 trication
3. Write the ground-state electron configuration for the following atoms or ions. Use core notation in your electron configurations at your own discretion.
(a) As
(b) Au
(c) Ce
(d) Zn2−
(e) Po4+
4. Write an appropriate set of four quantum numbers (n, l, ms & ms) that could be representative of a valence electron in each of the following atoms or ions.
(a) Bi
(b) Sr
(c) Mo
(d) Ru2+
(e) Eu
5. In theory, there are an infinite number of energy levels and atomic orbital types that we can define using the solutions to the Schrödinger…
a)For carbon-12 and carbon-14, how many protons and neutrons are in each nucleus?
Carbon-12 has protons.
Carbon-12 has neutrons.
Carbon-14 has protons.
Carbon-14 has neutrons.
(1b )Assuming neutral atoms, how many electrons are present in an atom of carbon-12 and in an atom of carbon-14?
Carbon-12 has electrons.
Carbon-14 has electrons.
Chapter 2 Solutions
Chemistry for Engineering Students
Ch. 2 - Name at least three common polymers and give...Ch. 2 - Prob. 2COCh. 2 - Describe the nuclear model for the atom and...Ch. 2 - Prob. 4COCh. 2 - Prob. 5COCh. 2 - Prob. 6COCh. 2 - Prob. 7COCh. 2 - Prob. 8COCh. 2 - Prob. 9COCh. 2 - Prob. 10CO
Ch. 2 - Prob. 2.1PAECh. 2 - How do polymers compare to their respective...Ch. 2 - Look around you and identify several objects that...Ch. 2 - Prob. 2.4PAECh. 2 - The fact that a polymer’s physical properties...Ch. 2 - One application of conductive polymers is in...Ch. 2 - Prob. 2.7PAECh. 2 - Prob. 2.8PAECh. 2 - Why is the number of protons called the atomic...Ch. 2 - 2.10 Which isotope in each pair contains more...Ch. 2 - 2.11 Define the term isotope.Ch. 2 - 2.12 Write the complete atomic symbol for each of...Ch. 2 - 2.13 How many electrons, protons, and neutrons are...Ch. 2 - 2.14 Consider the following nuclear symbols. How...Ch. 2 - 2.15 Mercury is 16.716 times more massive than...Ch. 2 - The element gallium, used in gallium arsenide...Ch. 2 - 2.17 The atomic weight of copper is 63.55 amu....Ch. 2 - The following table presents the abundances and...Ch. 2 - 2.19 Naturally occurring uranium consists of two...Ch. 2 - Prob. 2.20PAECh. 2 - Prob. 2.21PAECh. 2 - 2.22 Provide the symbol of the following...Ch. 2 - Prob. 2.23PAECh. 2 - 2.24 Identify each of the following species as an...Ch. 2 - 2.25 Write the atomic symbol for the element whose...Ch. 2 - 2.26 In what region of the periodic table are you...Ch. 2 - Prob. 2.27PAECh. 2 - Prob. 2.28PAECh. 2 - Prob. 2.29PAECh. 2 - 2.30 Using Coulomb’s law, explain how the...Ch. 2 - Prob. 2.31PAECh. 2 - 2.32 Which of the following formulas contains the...Ch. 2 - Prob. 2.33PAECh. 2 - Prob. 2.34PAECh. 2 - Prob. 2.35PAECh. 2 - 2.36 Explain the difference between a molecular...Ch. 2 - 2.37 Why are empirical formulas preferred for...Ch. 2 - 2.38 The molecular formula for the ethylene...Ch. 2 - 239 Polybutadiene is a synthetic elastomer, or...Ch. 2 - 2.40 What distinguished the work of Mendeleev that...Ch. 2 - 2.41 How does the periodic table help to make the...Ch. 2 - 2.42 What is a period in the periodic table? From...Ch. 2 - 2.43 Name of the group to which each of the...Ch. 2 - Prob. 2.44PAECh. 2 - Prob. 2.45PAECh. 2 - 2.46 Why are nonmetals important even though they...Ch. 2 - Prob. 2.47PAECh. 2 - A materials engineer has filed for a patent for a...Ch. 2 - Prob. 2.49PAECh. 2 - 2.50 A materials engineer wants to make a new...Ch. 2 - Prob. 2.51PAECh. 2 - Prob. 2.52PAECh. 2 - 2.53 What is meant by the phrase organic...Ch. 2 - 2.54 Based on what you have learned in this...Ch. 2 - 2.55 What is a functional group? How does the...Ch. 2 - Prob. 2.56PAECh. 2 - Prob. 2.57PAECh. 2 - Prob. 2.58PAECh. 2 - 2.59 The accompanying figure shows the structure...Ch. 2 - Prob. 2.60PAECh. 2 - 2.61 Name the following covalent compounds: (a)...Ch. 2 - Prob. 2.62PAECh. 2 - Prob. 2.63PAECh. 2 - Prob. 2.64PAECh. 2 - Prob. 2.65PAECh. 2 - Prob. 2.66PAECh. 2 - Prob. 2.67PAECh. 2 - 2.68 What is a free radical? How are free radicals...Ch. 2 - Prob. 2.69PAECh. 2 - 2.70 Why do you think an inhibitor molecule is...Ch. 2 - 2.71 Use the web to determine the amount of...Ch. 2 - 2.72 How can an element have an atomic weight that...Ch. 2 - 2.73 Explain the concept of a “weighted” average...Ch. 2 - 2.74 The accompanying table provides the identity...Ch. 2 - 2.75 Chlorine has only two isotopes, one with mass...Ch. 2 - Prob. 2.76PAECh. 2 - Prob. 2.77PAECh. 2 - Prob. 2.78PAECh. 2 - Prob. 2.79PAECh. 2 - 2.80 Of the following elements, which two would...Ch. 2 - 2.81 How do binary compounds with hydrogen...Ch. 2 - Prob. 2.82PAECh. 2 - Prob. 2.83PAECh. 2 - 2.84 Early attempts to arrange the elements often...Ch. 2 - 2.85 Describe how the saying “opposites attract”...Ch. 2 - 2.86 For some uses, the relative abundance of...Ch. 2 - 2.87 What is the heaviest element to have an...Ch. 2 - 2.88 Describe how you can identify the isotope, X,...Ch. 2 - Prob. 2.89PAECh. 2 - 2.90 Naturally occurring europium has an average...Ch. 2 - 2.91 Strontium has four stable isotopes....Ch. 2 - 2.92 A candy manufacturer makes chocolate-covered...Ch. 2 - Prob. 2.93PAECh. 2 - 2.94 Use a molecular level description to...Ch. 2 - 2.95 Engineers who design bicycle frames are...Ch. 2 - 2.96 Use the web to look up the density of...Ch. 2 - 2.97 LDPE has a density in the range of...
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- 2-43 Which group(s) of the Periodic Table contain(s): (a) Only metals? (b) Only metalloids? (c) Only nonmetals?arrow_forward2-44 Which period(s) in the Periodic Table contain(s) more nonmetals than metals? Which contain(s) more metals than nonmetals?arrow_forward2-73 (Chemical Connections 2D) Copper is a soft metal. how can it be made harder?arrow_forward
- 2-17 How does Dalton’s atomic theory explain: (a) the law of conservation of mass? (b) the law of constant composition?arrow_forward2-23 It has been said, “The number of protons determines the identity of the element.” Do you agree or disagree with this statement? Explain.arrow_forward2-59 You are presented with a Lewis dot structure of element X as X.. To which two groups in the Periodic Table might this element belong?arrow_forward
- 2-99 A 7.12 g sample of magnesium is heated with 1.80 g of bromine. All the bromine is used up, and 2.07 g of magnesium bromide is produced. What mass of magnesium remains unreacted?arrow_forward2-100 A 0.100 g sample of magnesium, when combined with oxygen, yields 0.166 g of magnesium oxide. What masses of magnesium and oxygen must be combined to make exactly 2.00 g of magnesium oxide?arrow_forwardArrange the following in the order of increasing mass. (a) a potassium ion, K+ (b) a phosphorus molecule, P4 (c) a potassium atom (d) a platinum atomarrow_forward
- 2-103 The element silver has two naturally occurring isotopes: 109Ag and 107Ag with a mass of 106.905 amu. Silver consists of 51.82% 07Ag and has an average atomic mass of 107.868 amu. Calculate the mass of 109Agarrow_forwardFrom the following written description, write the balanced chemical equation for the reaction including state symbols. A diatomic gaseous molecule that contains 17 protons per atom is reacted with a solid element that has an atomic number of 19 to yield an ionic compound.arrow_forwardA sample of an ionic compound containing iron and chlorineis analyzed and found to have a molar mass of 126.8 g>mol.What is the charge of the iron in this compound?(a) 1+ (b) 2+ (c) 3+ (d) 4+arrow_forward
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