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Helium atom has 2 electrons in its valen...

Helium atom has 2 electrons in its valence shell but its valency is not 2. Explain.

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**Step-by-Step Solution:** 1. **Understanding the Helium Atom:** - The helium atom has a total of 2 electrons. These electrons are located in its only electron shell, known as the K shell. 2. **Electron Configuration:** - The K shell can hold a maximum of 2 electrons. Since helium has 2 electrons, its K shell is completely filled. ...
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