Chemistry Atoms First2e
2nd Edition
ISBN: 9781947172647
Author: OpenStax
Publisher: OpenStax College
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Chapter 2, Problem 15E
Open the Build an Atom simulation (http://openstax.org/l/16PhetAtomBld)
(a) Drag protons, neutrons, and electrons onto the atom template to make a neutral atom of Lithium-6 and give the isotope symbol for this atom.
(b) Now remove one electron to make an ion and give the symbol for the ion you have created.
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Solve the given problem using an element that has three naturally occurring isotopes.
Click on the site (http://openstaxcollege.org/l/16PhetAtomMass) and select the “Mix Isotopes” tab, hide the “Percent Composition” and “Average Atomic Mass” boxes, and then select the element boron.(a) Write the symbols of the isotopes of boron that are shown as naturally occurring in significant amounts.(b) Predict the relative amounts (percentages) of these boron isotopes found in nature. Explain the reasoning behind your choice.(c) Add isotopes to the black box to make a mixture that matches your prediction in (b). You may drag isotopes from their bins or click on “More” and then move the sliders to the appropriate amounts.(d) Reveal the “Percent Composition” and “Average Atomic Mass” boxes. How well does your mixture match with your prediction? If necessary, adjust the isotope amounts to match your prediction.(e) Select “Nature’s” mix of isotopes and compare it to your prediction. How well does…
3) Calculate the atomic mass of the following element with three isotopes (masses and relative abundances given below). Referring to the periodic
table, identify the element.
27.9769 u, 92.2232%
28.9765 u, 4.6858%
29.9738 u, 3.0921%
Open the Build an Atom simulation (http://openstaxcollege.org/l/16PhetAtomBld) and click on theAtom icon.(a) Pick any one of the first 10 elements that you would like to build and state its symbol.(b) Drag protons, neutrons, and electrons onto the atom template to make an atom of your element. State the numbers of protons, neutrons, and electrons in your atom, as well as the net charge and mass number.(c) Click on “Net Charge” and “Mass Number,” check your answers to (b), and correct, if needed.(d) Predict whether your atom will be stable or unstable. State your reasoning.(e) Check the “Stable/Unstable” box. Was your answer to (d) correct? If not, first predict what you can do to make a stable atom of your element, and then do it and see if it works. Explain your reasoning.
Chapter 2 Solutions
Chemistry Atoms First2e
Ch. 2 - In the following drawing, the green spheres...Ch. 2 - Which postulate of Dalton’s theory is consistent...Ch. 2 - Identify the postulate of Dalton’s theory that is...Ch. 2 - Samples of compound X, Y, and Z are analyzed, with...Ch. 2 - The existence of isotopes violates one of the...Ch. 2 - How are electrons and protons similar? How are...Ch. 2 - How are protons and neutrons similar? How are they...Ch. 2 - Predict and test the behavior of a particles fired...Ch. 2 - Predict and test the behavior of a particles fired...Ch. 2 - In what way are isotopes of a given element always...
Ch. 2 - Write the symbol for each of the following ions:...Ch. 2 - Write the symbol for each of the following ions:...Ch. 2 - Open the Build an Atom simulation...Ch. 2 - Open the Build an Atom simulation...Ch. 2 - Open the Build an Atom simulation...Ch. 2 - Determine the number of protons, neutrons, and...Ch. 2 - The following are properties of isotopes of two...Ch. 2 - Give the number of protons, electrons, and...Ch. 2 - Give the number of protons, electrons, and...Ch. 2 - Click on the site...Ch. 2 - Click on the site...Ch. 2 - An element has the following natural abundances...Ch. 2 - Average atomic masses listed by JUPAC are based on...Ch. 2 - Variations in average atomic mass may be observed...Ch. 2 - The average atomic masses of some elements may...Ch. 2 - The 18O:16O abundance ratio in some meteorites is...Ch. 2 - Explain why the symbol for an atom of the element...Ch. 2 - Explain why the symbol for the element sulfur and...Ch. 2 - Write the molecular and empirical formulas of the...Ch. 2 - Write the molecular and empirical formulas of the...Ch. 2 - Determine the empirical formulas for the following...Ch. 2 - Determine the empirical formulas for the following...Ch. 2 - Write the empirical formulas for the following...Ch. 2 - Open the Build a Molecule simulation...Ch. 2 - Use the Build a Molecule simulation...Ch. 2 - Use the Build a Molecule simulation...Ch. 2 - Write a sentence that describes how to determine...Ch. 2 - Compare 1 mole of H2, 1 mole of o2, and 1 mole of...Ch. 2 - Which contains the greatest mass of oxygen: 0.75...Ch. 2 - Which contains the greatest number of moles of...Ch. 2 - How are the molecular mass and the molar mass of a...Ch. 2 - Calculate the molar mass of each of the following...Ch. 2 - Calculate the molar mass of each of the following:...Ch. 2 - Calculate the empirical or molecular formula mass...Ch. 2 - Calculate the molar mass of each of the following:...Ch. 2 - Determine the number of moles of compound and the...Ch. 2 - Determine the mass of each of the following: (a)...Ch. 2 - Determine the number of moles of the compound and...Ch. 2 - Determine the mass of each of the following: (a)...Ch. 2 - The approximate minimum daily dietary requirement...Ch. 2 - Determine the mass in grams of each of the...Ch. 2 - A 55-kg woman has 7.5103 mol of hemoglobin (...Ch. 2 - Determine the number of atoms and the mass of...Ch. 2 - Determine which of the following contains the...Ch. 2 - Determine which of the following contains the...Ch. 2 - Diamond is one form of elemental carbon. An...Ch. 2 - The Cullinan diamond was the largest natural...Ch. 2 - One 53-gram serving of a particular cereal...Ch. 2 - A certain nut crunch cereal contains 11.0 grams of...Ch. 2 - A tube of toothpaste contains 0.76 g of sodium...Ch. 2 - Which of the following represents the least number...
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- Click on the site (http://openstaxcollege.org/l/16PhetAtomMass) and select the Mix Isotopes tab, hide the Percent Composition and Average Atomic Mass boxes, and then select the element boron. Write the symbols of the isotopes of boron that are shown as naturally occurring in significant amounts. Predict the relative amounts (percentages) of these boron isotopes found in nature. Explain the reasoning behind your choice. Add isotopes to the black box to make a mixture that matches your prediction in (b). You may drag isotopes from their bins or click on More and then move the sliders to the appropriate amounts. Reveal the Percent Composition and Average Atomic Mass boxes. How well does your mixture match with your prediction? If necessary, adjust the isotope amounts to match your prediction. Select Nature’s mix of isotopes and compare it to your prediction. How well does your prediction compare with the naturally occurring mixture? Explain. If necessary, adjust your amounts to make them match Nature’s amounts as closely as possible.arrow_forwardThese questions concern the work of J. J. Thomson. a. From Thomsons work, which particles do you think he would feel are most important for the formation of compounds (chemical changes) and why? b. Of the remaining two subatomic particles, which do you place second in importance for forming compounds and why? c. Propose three models that explain Thomsons findings and evaluate them. To be complete you should include Thomsons findings.arrow_forwardOpen the Build an Atom simulation (http://openstaxcollege.org/l/16PhetAtomBld)(a) Drag protons, neutrons, and electrons onto the atom template to make a neutral atom of Lithium-6 and give the isotope symbol for this atom.(b) Now remove one electron to make an ion and give the symbol for the ion you have created.arrow_forward
- Antimony has many uses, including infrared devices and as part of an alloy in lead storage batteries. The element has two naturally occurring isotopes, one with mass 120.904 amu, the other with mass 122.904 amu.(a) Enter the notation for each isotope. antimony−121 antimony−123 (b) The atomic mass of antimony is 121.8 amu. Use this value to calculate the percent abundance of each isotope. % antimony−121 % antimony−123arrow_forward77. Determine the number of protons and electrons in each ion. (a) Na+ (b) Ва?+ (c) O²- (d) Co³+arrow_forwardThe following are properties of isotopes of two elements that are essential in our diet. Determine the number of protons, neutrons and electrons in each and name them.(a) atomic number 26, mass number 58, charge of 2+(b) atomic number 53, mass number 127, charge of 1−arrow_forward
- Determine the charge of each ion.(a) oxygen ion with 10 electrons(b) aluminum ion with 10 electrons(c) titanium ion with 18 electrons(d) iodine ion with 54 electronsarrow_forwardWrite the symbol for each of the following particles. (a) an atom with 13 protons and 13 electrons(b) a beryllium atom that has lost 3 electrons(c) a bromine atom that has gained 1 electron(d) a carbon atom with 8 neutrons in its nucleusarrow_forwardA) If a cube from this element contains 2.35x1022 atoms, calculate the mass ( in grams) B) If the cube with the same mass as part A is made of iron, determine the edge length of this cube (in cm). Remember, the edge lengths of the cube are equal and the volume of the cube equal, V= LxWxH Symbol Mass (amu) Natural Abundance (%) Isotope 1:X 46.00 45% Isotope 2: X 48.00 55.00 Average mass: 47.10 g/molarrow_forward
- Write formulas for these acids: (a) acetic acid (d) boric acid (b) hydrofluoric acid (e) nitrous acid (c) hydrosulfuric acid (f) hypochlorous acidarrow_forwardPredict charge on monoatomic ions. (a) How many protons and electrons are in a Bi³+ ion? #protons = #electrons = (b) Identify the ion formed by chlorine. Symbol for ion = How many protons and electrons are in this ion? # protons = # electrons =arrow_forwardim working on this assignment and stumbled across this question 6. There is a compound C4H5As. Look up the abundances of the naturally-occurring isotopes of each element in this compound. In one mole of this compound (called arsole), calculate (A) the number of molecules that have four 12C atoms and five 1H atoms, (B) the number of molecules that have four 12C atoms and four 1H atoms and one 2H atom, (C) the number of molecules that have four 12C atoms and three 1H atoms and two 2H atoms, (D) the number of molecules that have four 12C atoms and two 1H atoms and three 2H atoms, (E) the number of molecules that have four 12C atoms and one 1H atom and four 2H atoms, (F) the number of molecules that have four 12C atoms and zero 1H atoms and five 2H atoms, (G) the number of molecules that have three 12C atoms and one 13C atom and five 1H atoms, (H) the number of molecules that have three 12C atoms and one 13C atom and four 1H atoms and one 2H atoms, (I) the number of molecules that have…arrow_forward
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