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 4 - Covalent Compounds - Problems - Page 105: 4.5

Answer

CaO: Ionic bond; CO2: Covalent bonds. The difference occurs because Calcium (Ca) is a metal, and Carbon (C) is a nonmetal, like Oxygen;

Work Step by Step

Ca and O have very different electronegativity, so they form ionic bonds, and C and O have a lower diference, so they form covalent bonds.
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