Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 4 - Atoms and Elements - Exercises - Problems: 74

Answer

(a) Magnesium loses 2 electrons to obtain a stable configuration and form a $Mg^{2+}$ cation Mg to $Mg^{2+}$ + $2e^{-}$ (b) Barium loses 2 electrons to obtain a stable configuration and form a $Ba^{2+}$ cation Ba to $Ba^{2+}$ + $2e^{-}$ (c) Iodine atom acquires 1 electron to obtain a stable configuration and form a $I^{-}$ anion I + e- to $I^{-}$ (d) Aluminum loses 3 electrons to obtain a stable configuration and form a $Al^{3+}$ cation Al to $Al^{3+}$ + $3e^{-}$

Work Step by Step

(a) Magnesium loses 2 electrons to obtain a stable configuration and form a $Mg^{2+}$ cation Mg to $Mg^{2+}$ + $2e^{-}$ (b) Barium loses 2 electrons to obtain a stable configuration and form a $Ba^{2+}$ cation Ba to $Ba^{2+}$ + $2e^{-}$ (c) Iodine atom acquires 1 electron to obtain a stable configuration and form a $I^{-}$ anion I + e- to $I^{-}$ (d) Aluminum loses 3 electrons to obtain a stable configuration and form a $Al^{3+}$ cation Al to $Al^{3+}$ + $3e^{-}$
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