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In CaO , the valency of each atom is .(...

In `CaO` , the valency of each atom is _______________ .(one/two/three)

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To determine the valency of each atom in calcium oxide (CaO), we will analyze the electronic configurations and the tendency of each atom to gain or lose electrons. ### Step-by-Step Solution: 1. **Identify the Elements**: - The compound CaO consists of calcium (Ca) and oxygen (O). 2. **Determine the Atomic Numbers**: ...
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