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Lewis Structures and Formal Charge Video Lecture | Chemistry Class 11 - NEET

FAQs on Lewis Structures and Formal Charge Video Lecture - Chemistry Class 11 - NEET

1. What is a Lewis structure?

Ans. A Lewis structure is a diagram that represents the valence electrons in an atom or molecule. It uses dots to represent electrons and lines to represent chemical bonds between atoms.

2. How do you determine the formal charge in a Lewis structure?

Ans. To determine the formal charge of an atom in a Lewis structure, you need to subtract the number of non-bonding electrons and half of the bonding electrons from the atom's valence electron count. The formula for formal charge is Formal Charge = Valence Electrons - Non-bonding Electrons - (1/2) x Bonding Electrons.

3. Can an atom in a Lewis structure have a formal charge of zero?

Ans. Yes, an atom in a Lewis structure can have a formal charge of zero. This occurs when the atom has the same number of valence electrons as its neutral state or when it has an equal number of non-bonding and bonding electrons.

4. What is the purpose of drawing Lewis structures?

Ans. The purpose of drawing Lewis structures is to understand the bonding and electron distribution in molecules or ions. It helps in predicting the shape, polarity, and reactivity of molecules. Lewis structures also provide a visual representation of how atoms are connected and the distribution of electrons involved in chemical reactions.

5. How do you determine the most stable Lewis structure?

Ans. The most stable Lewis structure is determined by considering the formal charges, octet rule, and minimizing the separation of opposite charges. The structure with the lowest formal charges and the most atoms with complete octets (except for H and He) is generally the most stable. Additionally, structures with negative charges on more electronegative atoms are more stable.

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Oct 04, 2025 Last updated

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