EP CONCEPTUAL PHYSICAL SCI.-MOD.MASTER.
6th Edition
ISBN: 9780134091983
Author: Hewitt
Publisher: PEARSON CO
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Chapter 12, Problem 31TAS
To determine
The effect of heavier isotopes in
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Element X has 3 isotopes. One of the isotopes has a mass of 59.5 with an abundance of 43.3%. Another isotope with a mass of 63.8
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Give your answer to the nearest tenth (one decimal).
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What is the half-life of this radioactive material (Barium 137) in seconds? Now, if we waited 8 half-lives, how many seconds would that be? What fraction of the original material would remain after that time? Explain how you decided on these answers.
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Chapter 12 Solutions
EP CONCEPTUAL PHYSICAL SCI.-MOD.MASTER.
Ch. 12 - Prob. 1RCQCh. 12 - Prob. 2RCQCh. 12 - Prob. 3RCQCh. 12 - Prob. 4RCQCh. 12 - Prob. 5RCQCh. 12 - Prob. 6RCQCh. 12 - Prob. 7RCQCh. 12 - Prob. 8RCQCh. 12 - Prob. 9RCQCh. 12 - Prob. 10RCQ
Ch. 12 - Prob. 11RCQCh. 12 - Prob. 12RCQCh. 12 - If a baseball were the size of Earth, about how...Ch. 12 - Prob. 14RCQCh. 12 - Prob. 15RCQCh. 12 - Prob. 16RCQCh. 12 - Prob. 17RCQCh. 12 - Prob. 18RCQCh. 12 - Prob. 19RCQCh. 12 - Prob. 20RCQCh. 12 - Prob. 21RCQCh. 12 - Prob. 22RCQCh. 12 - Prob. 23RCQCh. 12 - Prob. 24RCQCh. 12 - Prob. 25RCQCh. 12 - Prob. 26RCQCh. 12 - Prob. 27RCQCh. 12 - Prob. 31TASCh. 12 - Prob. 32TASCh. 12 - Prob. 33TASCh. 12 - Rank the following three subatomic particles in...Ch. 12 - Prob. 35TARCh. 12 - Consider three 1-gram samples of matter: A,...Ch. 12 - Prob. 37TARCh. 12 - Prob. 38TARCh. 12 - Prob. 39ECh. 12 - If all the molecules of a body remained part of...Ch. 12 - Prob. 41ECh. 12 - Prob. 42ECh. 12 - Prob. 43ECh. 12 - In what sense can you truthfully say that you are...Ch. 12 - Prob. 45ECh. 12 - Prob. 46ECh. 12 - Prob. 47ECh. 12 - Prob. 48ECh. 12 - Prob. 49ECh. 12 - Prob. 50ECh. 12 - The nucleus of an electrically neutral iron atom...Ch. 12 - Prob. 52ECh. 12 - Prob. 53ECh. 12 - Prob. 54ECh. 12 - Prob. 55ECh. 12 - Prob. 56ECh. 12 - Prob. 57ECh. 12 - Which is heavier: a water molecule, H2O, or a...Ch. 12 - When we breathe we inhale oxygen, O2, and exhale...Ch. 12 - Prob. 60ECh. 12 - Prob. 61ECh. 12 - Prob. 62ECh. 12 - Prob. 63ECh. 12 - Prob. 64ECh. 12 - Prob. 65ECh. 12 - Prob. 66ECh. 12 - Prob. 74ECh. 12 - Prob. 75ECh. 12 - Prob. 76ECh. 12 - Prob. 77ECh. 12 - Prob. 78ECh. 12 - Prob. 79ECh. 12 - Prob. 80ECh. 12 - Prob. 81ECh. 12 - Prob. 82ECh. 12 - Prob. 83ECh. 12 - Prob. 84ECh. 12 - Prob. 85ECh. 12 - Prob. 86ECh. 12 - Prob. 87DQCh. 12 - Prob. 88DQCh. 12 - In 2011, China was the leading producer of...Ch. 12 - Prob. 90DQCh. 12 - Prob. 1RATCh. 12 - Prob. 2RATCh. 12 - Prob. 3RATCh. 12 - Prob. 4RATCh. 12 - Prob. 5RATCh. 12 - Prob. 6RATCh. 12 - Prob. 7RATCh. 12 - Prob. 8RATCh. 12 - Prob. 9RATCh. 12 - Prob. 10RAT
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- If an atom has 100 electrons, 157 neutrons, and 100 protons, what is its approximate atomic mass? What is the name of this element?arrow_forwardYour friend says that what makes one element distinct from another is the number of electrons about the atomic nucleus. Do you agree wholeheartedly, partially, or not at all? Explain.arrow_forwardWhat are the different kinds of particles in the atom's nucleus? Compare their properties with each other and with those of an electron.arrow_forward
- Which of the following diagrams best represents the size of the atomic nucleus relative to the size of the atom?arrow_forwardAt the beginning of an experiment, a scientist has 164 grams of radioactive goo. After 135 minutes, her sample has decayed to 20.5 grams. What is the half-life of the goo in minutes? Find a formula for G(t), the amount of goo remaining at time t. G(t) = %3D How many grams of goo will remain after 41 minutes?arrow_forwardIn a naturally occurring sample, 19.8% of boron atoms have 5 neutrons and 80.2% have 6 neutrons. What is the mass number of each boron isotope? Sketch a sample of 10 atoms that is nearly representative of a natural sample. What is the average mass of the atoms in your drawing? What is the atomic mass of boron? (Boron-10 has a mass of 10.01294 amu, and boron-11 has a mass of 11.00931 amu.)arrow_forward
- At the beginning of an experiment, a scientist has 336 grams of radioactive goo. After 60 minutes, her sample has decayed to 42 grams. TRY NOT TO ROUND UNTIL THE VERY END. What is the half-life of the goo in minutes? Find a formula for G(t), the amount of goo remaining at time t. G(t) = How many grams of goo will remain after 14 minutes?arrow_forwardWhat is the difference between atomic mass and atomic weight? Select one: a. Atomic mass is the average of the atomic masses of an atom's naturally occurring isotopes, whereas atomic weight is the weight of an individual atom. b. Atomic mass is the mass of an individual atom, whereas atomic weight is the average (weighted) of the atomic masses of an atom's naturally occurring isotopes. C. Atomic weight = Atomic mass x g. d. Atomic mass is characterized by the number of neutrons in the nucleus, whereas atomic weight is the weight of an individual atom. e. Atomic mass is characterized by the number of protons in the nucleus, whereas atomic weight is the average (weighted) of the atomic masses of an atom's naturally occurring isotopes.arrow_forwardRound off final answers to 4 decimal places and floating values for intermediate answers. Use 2 decimal places for molecular weights.arrow_forward
- Sketch a model of an atom, showing the positions of the subatomic particles protons, neutrons, and electrons.arrow_forwardChoose the BEST answer to the following. When an element ejects an alpha particle, the atomic number of the resulting element (a) reduces by 2. (b) reduces by 4. (c) increases by 2. (d) increases by 4.arrow_forwardLook at the chemical elements in Appendix K. Can you identify any relationship between the abundance of an element and its atomic weight? Are there any obvious exceptions to this relationship?arrow_forward
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