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Define octet rule and write its significance and limitations.
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According to octet rule, atom tends to have 8 electrons in the valence shell to attain stable configuration.
Significance: It explains the reason behind the chemical combination of different atoms to form ionic or covalent bond.
Limitations :
(1) Hydrogen with 1 electron attains stability by sharing, gaining or losing 1 valence electron. It does not need to complete octet to attain stability. Also, He has only 2 electrons and is stable.
(2) Incomplete octet: In certain molecules such as , the central atom has less than 8 electrons in its valence shell, yet the molecule is stable.
(3) Expanded octet: In certain molecules such as , the central atom has more than 8 valence electrons, yet the molecule is stable.
Significance: It explains the reason behind the chemical combination of different atoms to form ionic or covalent bond.
Limitations :
(1) Hydrogen with 1 electron attains stability by sharing, gaining or losing 1 valence electron. It does not need to complete octet to attain stability. Also, He has only 2 electrons and is stable.
(2) Incomplete octet: In certain molecules such as , the central atom has less than 8 electrons in its valence shell, yet the molecule is stable.
(3) Expanded octet: In certain molecules such as , the central atom has more than 8 valence electrons, yet the molecule is stable.
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Question Text | Define octet rule and write its significance and limitations. |
Updated On | Sep 23, 2023 |
Topic | Chemical Bonding and Molecular Structure |
Subject | Chemistry |
Class | Class 11 |
Answer Type | Text solution:1 Video solution: 2 |
Upvotes | 229 |
Avg. Video Duration | 5 min |