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Course: Bridge Course Class 11th Chemistry > Unit 2

Lesson 1: Basics of Covalent bonding
Science
Bridge Course Class 11th Chemistry
Chemical Bonding
Basics of Covalent bonding
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Formation and properties of ionic compounds

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Problem

Calcium oxide, also known as quicklime, is believed to be one of the oldest chemicals known to the human race.
A sample of calcium oxide powder in a watch glass.
A sample of calcium oxide. Image credit: Leiem.
Identify the ions present in calcium oxide.
Note: The atomic numbers of Ca is 20 and O is 8.
Choose 2 answers: