Chapter 30 Answers

© 2005 Pearson Education, Inc., Upper Saddle River, NJ. all rights reserved. This material is protected on a lower appall only copyright laws as they currently exist. No mountain of this material may be reproduced, in every process upon or by any means, without permission in opus from the publisher. 334 CHAPTER 30: Nuclear natural philosophy and Radioactivity Answers to Questions 1. Different isotopes of a stipulation instalment bind the alike derive of protons and electrons. Because they have the get even issuing of electrons, they have nearly identical chemical properties. for all(prenominal) one isotope has a different trope of neutrons from other isotopes of the same piece. Accordingly, they have different nuclear grasses. 2. Identify the gene based on the nuclear number. (a) uracil (A = 92) (b) Nitrogen (A = 7) (c) enthalpy (A = 1) (d) Strontium (A = 38) (e) Berkelium (A = 97) 3. The number of protons is the same as the nuclear number, and the number of protons is the stack number electronegative the number of protons. (a) Uranium: 92 protons, 140 neutrons (b) Nitrogen: 7 protons, 11 neutrons (c) Hydrogen: 1 proton, 0 neutrons (d) Strontium: 38 protons, 44 neutrons (e) Berkelium: 97 protons, 150 neutrons 4. With 88 nucleons and 50 neutrons, on that point must(prenominal) be 38 protons. This is the nuclear number, and so the element is strontium.

The nuclear symbolic representation would be 88 38Sr . 5. The atomic lot of an element as shown in the periodic table is the second-rate atomic mass of all naturally-occurring isotopes. For example, atomic number 17 occurs as roughly 75% 35 17 Cl and 25% 36 17 Cl , and so its atomic mass is about 35.5. This is the ordinary atomic mass that a ideal of naturally-occurring chlorine would have. opposite venialer effects would imply the fact that the masses of the nucleons are non exactly 1 atomic mass unit, and that just about small fraction of the mass nothing of the match set of nucleons is in the form of binding energy. 6. in that location must be some force holding the kernel together. For all nuclei with atomic numbers...If you destiny to get a wide-cut essay, tell apart it on our website: Orderessay

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