General, Organic, & Biological Chemistry 3rd Edition

Published by McGraw-Hill Education
ISBN 10: 0-07351-124-2
ISBN 13: 978-0-07351-124-5

Chapter 2 - Atoms and the Periodic Table - Problems - Page 45: 2.14

Answer

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Work Step by Step

Magnesium (Mg) has an atomic number of 12, which means every magnesium atom has 12 protons. In a neutral atom, the number of electrons equals the number of protons. Magnesium Isotopes Isotope with 12 neutrons (a) Protons: 12 (b) Electrons: 12 (c) Atomic Number: 12 (d) Mass Number: 12 + 12 = 24 Isotope Symbol: ²⁴Mg Isotope with 13 neutrons (a) Protons: 12 (b) Electrons: 12 (c) Atomic Number: 12 (d) Mass Number: 12 + 13 = 25 Isotope Symbol: ²⁵Mg Isotope with 14 neutrons (a) Protons: 12 (b) Electrons: 12 (c) Atomic Number: 12 (d) Mass Number: 12 + 14 = 26 Isotope Symbol: ²⁶Mg
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