General Chemistry: Atoms First
2nd Edition
ISBN: 9780321809261
Author: John E. McMurry, Robert C. Fay
Publisher: Prentice Hall
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Chapter 1, Problem 1.23CP
Interpretation Introduction
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a) How many protons, electrons, and neutrons are in an 266 Sg atom?
(atomic mass = 266)
b) Atoms of Sg are very unstable, and it is therefore difficult to study this element's properties. Based on the position of Sg in the periodic table, what element should it most closely resemble in its chemical properties?
While roaming a parallel universe, you discover the hypothetical element "Z." You obtain a representative sample of the element and discover that it is made up of two isotopes, Z-47 and Z-51.To help your science team calculate the atomic weight of the substance, you send the following drawing of your sample with your report.
In the report, you also inform the science team that the blue atoms are Z- 47, which have an isotopic mass of 47.621amu, and the orange atoms are Z-51, which have an isotopic mass of 51.217 AMU. What is the atomic weight of element Z?
The image shows a representative sample of 5050 atoms of a fictious element, called lemonium (LeLe). Lemonium consists of three isotopes. The red spheres are Le–19, the light blue spheres are Le–17, and the dark blue spheres are Le–15. Determine the percent natural abundance of each of the three isotopes.
Le–19 has an atomic mass of 19.0134 u, Le–17 has an atomic mass of 17.4629 u,, and Le–15 has an atomic mass of 15.7384 u. Use the natural abundance and atomic mass of each isotope to determine the average atomic mass of Le.
average atomic mass:
Chapter 1 Solutions
General Chemistry: Atoms First
Ch. 1.1 - Look at the alphabetical list of elements inside...Ch. 1.1 - Prob. 1.2PCh. 1.3 - Identify the following elements as metals,...Ch. 1.3 - Prob. 1.4CPCh. 1.5 - Compounds A and B are colorless gases obtained by...Ch. 1.7 - The gold foil Rutherford used in his scattering...Ch. 1.7 - A small speck of carbon the size of a pinhead...Ch. 1.8 - The isotope S3475e is used medically for the...Ch. 1.8 - Chlorine, one of the elements in common table salt...Ch. 1.8 - An atom of element X contains 47 protons and 62...
Ch. 1.9 - Copper metal has two naturally occurring isotopes:...Ch. 1.9 - Based on your answer to Problem 1.11, how many...Ch. 1.9 - What is the mass in grams of each of the following...Ch. 1.9 - How many moles are in each of the following...Ch. 1.11 - Prob. 1.15PCh. 1.11 - Prob. 1.16PCh. 1.11 - Prob. 1.17CPCh. 1.11 - Prob. 1.18PCh. 1.11 - Prob. 1.19PCh. 1 - Prob. 1.20CPCh. 1 - Where on the following outline of a periodic table...Ch. 1 - Prob. 1.22CPCh. 1 - Prob. 1.23CPCh. 1 - If yellow spheres represent sulfur atoms and red...Ch. 1 - Prob. 1.25CPCh. 1 - Prob. 1.26CPCh. 1 - Prob. 1.27CPCh. 1 - In the following drawings, red spheres represent...Ch. 1 - Isotope A decays to isotope E through the...Ch. 1 - Prob. 1.30SPCh. 1 - Prob. 1.31SPCh. 1 - Prob. 1.32SPCh. 1 - Prob. 1.33SPCh. 1 - Prob. 1.34SPCh. 1 - Prob. 1.35SPCh. 1 - Prob. 1.36SPCh. 1 - Prob. 1.37SPCh. 1 - Prob. 1.38SPCh. 1 - Prob. 1.39SPCh. 1 - Prob. 1.40SPCh. 1 - Prob. 1.41SPCh. 1 - Prob. 1.42SPCh. 1 - Prob. 1.43SPCh. 1 - Prob. 1.44SPCh. 1 - Prob. 1.45SPCh. 1 - Prob. 1.46SPCh. 1 - Prob. 1.47SPCh. 1 - Prob. 1.48SPCh. 1 - Prob. 1.49SPCh. 1 - Prob. 1.50SPCh. 1 - Prob. 1.51SPCh. 1 - Prob. 1.52SPCh. 1 - Prob. 1.53SPCh. 1 - Prob. 1.54SPCh. 1 - Prob. 1.55SPCh. 1 - Prob. 1.56SPCh. 1 - Prob. 1.57SPCh. 1 - Prob. 1.58SPCh. 1 - Prob. 1.59SPCh. 1 - Prob. 1.60SPCh. 1 - If 6.02 1023 atoms of element Y have a mass of...Ch. 1 - Prob. 1.62SPCh. 1 - Prob. 1.63SPCh. 1 - Prob. 1.64SPCh. 1 - Prob. 1.65SPCh. 1 - Prob. 1.66SPCh. 1 - Prob. 1.67SPCh. 1 - Prob. 1.68SPCh. 1 - Prob. 1.69SPCh. 1 - Prob. 1.70SPCh. 1 - Prob. 1.71SPCh. 1 - Prob. 1.72SPCh. 1 - Prob. 1.73SPCh. 1 - Prob. 1.74SPCh. 1 - Prob. 1.75SPCh. 1 - Prob. 1.76SPCh. 1 - Prob. 1.77SPCh. 1 - Prob. 1.78SPCh. 1 - Prob. 1.79SPCh. 1 - Prob. 1.80SPCh. 1 - Prob. 1.81SPCh. 1 - Prob. 1.82SPCh. 1 - Which of the following isotope symbols cant be...Ch. 1 - Prob. 1.84SPCh. 1 - Naturally occurring silver consists of two...Ch. 1 - Magnesium has three naturally occurring isotopes:...Ch. 1 - Prob. 1.87SPCh. 1 - Prob. 1.88SPCh. 1 - Prob. 1.89SPCh. 1 - Prob. 1.90SPCh. 1 - Prob. 1.91SPCh. 1 - Prob. 1.92SPCh. 1 - Prob. 1.93SPCh. 1 - Prob. 1.94SPCh. 1 - Prob. 1.95SPCh. 1 - Prob. 1.96SPCh. 1 - Prob. 1.97SPCh. 1 - Prob. 1.98SPCh. 1 - Prob. 1.99SPCh. 1 - Prob. 1.100SPCh. 1 - Prob. 1.101SPCh. 1 - Prob. 1.102CHPCh. 1 - Prob. 1.103CHPCh. 1 - Prob. 1.104CHPCh. 1 - Prob. 1.105CHPCh. 1 - Prob. 1.106CHPCh. 1 - Prob. 1.107CHPCh. 1 - Prob. 1.108CHPCh. 1 - Prob. 1.109CHPCh. 1 - Prob. 1.110CHPCh. 1 - The mass percent of an element in a compound is...Ch. 1 - Prob. 1.112CHPCh. 1 - Prob. 1.113CHPCh. 1 - In an alternate universe, the smallest negatively...
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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. 21. Repeat Exercise 2.20 using an element that has three naturally occurring isotopes.arrow_forwardAn isotope of an element contains 63 protons and 91 neutrons. (a) Identify the element and give its symbol. (b) Give the elements atomic number. (c) Give the mass number of the isotope. (d) This element has two naturally occurring isotopes. Given the information in the table, calculate the atomic weight of the element. (e) In which region of the periodic table is the element found? Explain your answer. (f) Is the element a metal, metalloid, or nonmetal? Explain your answer. (g) This element, used in compact fluorescent light bulbs and computer screens, has an atomic radius of 180 pm. Calculate how long the chain of atoms would be if all the atoms in a 1.25-mg sample of this element were put into a row.arrow_forwardTwo elements, R and Q, combine to form two binary compounds. In the first compound, 14.0 g of R combines with 3.00 g of Q. In the second compound, 7.00 g of R combines with 4.50 g of Q. Show that these data are in accord with the law of multiple proportions. If the formula of the second compound is RQ, what is the formula of the first compound?arrow_forward
- The element europium exists in nature as two isotopes: 151Eu has a mass of 150.9196 amu, and 153Eu has a mass of 152.9209 amu. The average atomic mass of europium is 151.96 amu. a. Calculate the relative abundance of the two europium isotopes. b. Graph each fractional abundance value as a y-axis value in association with its corresponding mass value on the x-axis. Starting from each x-axis value, where y = 0, draw a vertical line up to the fractional abundance value. The result will approximate the type of visual graph a mass spectrometer would yield for europium in the 150155 amu range.arrow_forwardGive the complete symbol (XZA), including atomic number and mass number, of (a) a nickel atom with 31 neutrons, and (b) a tungsten atom with 110 neutrons.arrow_forwardMass spectrometric analysis showed that there are four isotopes of an unknown element having the following masses and abundances: Three elements in the periodic table that have atomic weights near these values are lanthanum (La), atomic number 57, atomic weight 138.9055; cerium (Ce), atomic number 58, atomic weight 140.115; and praseodymium (Pr), atomic number 59, atomic weight 140.9076. Using the data above, calculate the atomic weight, and identify the element if possible.arrow_forward
- 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_forwardHere are three fictitious elements and a molecular view of the atoms that compose them. The molar mass of the middle element, (b), is 25 grams per dozen (g/doz). (The atoms of these fictitious elements are much larger than ordinary atoms.) Based on the size of the atoms, do you expect the atomic masses of elements (a) and (c) to be greater than or less than (b)? How many atoms are present in 175 g of element (b)?arrow_forwardNeon has three stable isotopes, one with a small abundance. What are the abundances of the other two isotopes? 20Ne, mass = 19.992435 u; percent abundance = ? 21Ne mass = 20.993843 u; percent abundance = 027% 22Ne mass = 21.991383 u: percent abundance = ?arrow_forward
- Argon has three naturally occurring isotopes: 0.3336% 36Ar, 0.063% 38Ar, and 99.60% 40Ar. Estimate the average atomic mass of argon. If the masses of the isotopes are 35.968 u, 37.963 u, and 39.962 u, respectively, calculate the average atomic mass of natural argon.arrow_forwardUranium-235 is the isotope of uranium commonly used in nuclear power plants. How many (a) protons are in its nucleus? (b) neutrons are in its nucleus? (c) electrons are in a uranium atom?arrow_forwardGiven that the periodic table is an organizational scheme for the elements, what might be some other logical ways in which to group the elements that would provide meaningful chemical information in a periodic table of your own devising?arrow_forward
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