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Answer the following: Define valency...

Answer the following:
Define valency. How is it calculated for various elements?

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### Step-by-Step Solution: 1. **Definition of Valency**: - Valency is defined as the combining capacity of an element with other atoms. It indicates how many electrons an atom can lose, gain, or share to achieve a stable electronic configuration, typically an octet. 2. **Understanding Electron Configuration**: - The electronic configuration of an element shows how its electrons are distributed in various energy levels (shells). The outermost shell's electrons are crucial for determining valency. ...
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