General Chemistry: Principles and Modern Applications (10th Edition)

by Petrucci, Ralph H.; Herring, F. Geoffrey; Madura, Jeffry D.; Bissonnette, Carey

Published by Pearson Prentice Hal

ISBN 10: 0132064529

ISBN 13: 978-0-13206-452-1

Chapter 2 - Atoms and the Atomic Theory - Exercises - Self-Assessment Exercises - Page 67: 103

Answer

(d) calcium

Work Step by Step

(d) Similar to magnesium, calcium (Ca) possesses two valence electrons in its outermost energy level and has an electron configuration of [Ar] 4s2. Calcium is also in the same group (Group 2) as magnesium, which means it shares similar properties with magnesium, such as high reactivity with water and the ability to form divalent cations.

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