Among the following, the molecule in which all atoms obey the octet rule is
Show Hint
- \(BCl_3\)
- \(BeH_2\)
- \(SF_6\)
- \(SCl_2\)
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Octet Rule The octet rule states that atoms tend to form compounds in which each atom has eight valence electrons, achieving a noble gas configuration.
Step 2: Evaluating Each Molecule - \(BCl_3\) (Boron Trichloride):
- Boron has only 6 valence electrons in this molecule.
- It does not follow the octet rule (exception due to an incomplete octet).
- \(BeH_2\) (Beryllium Hydride):
- Beryllium has only 4 valence electrons.
- It does not follow the octet rule (exception due to an incomplete octet).
- \(SF_6\) (Sulfur Hexafluoride):
- Sulfur has 12 valence electrons (expanded octet).
- It does not follow the octet rule (exception due to an expanded octet).
- \(SCl_2\) (Sulfur Dichloride):
- Sulfur has 8 valence electrons (follows the octet rule).
- Each chlorine atom also completes 8 valence electrons.
Step 3: Conclusion Only \(SCl_2\) follows the octet rule completely for all atoms. Thus, the correct answer is \( \mathbf{(4)} \) \( SCl_2 \).
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