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AnswerQuestion Answers for Class 12Class 12 BiologyClass 12 ChemistryClass 12 EnglishClass 12 MathsClass 12 PhysicsClass 12 Social ScienceClass 12 Business StudiesClass 12 EconomicsQuestion Answers for Class 11Class 11 EconomicsClass 11 Computer ScienceClass 11 BiologyClass 11 ChemistryClass 11 EnglishClass 11 MathsClass 11 PhysicsClass 11 Social ScienceClass 11 AccountancyClass 11 Business StudiesQuestion Answers for Class 10Class 10 ScienceClass 10 EnglishClass 10 MathsClass 10 Social ScienceClass 10 General KnowledgeQuestion Answers for Class 9Class 9 General KnowledgeClass 9 ScienceClass 9 EnglishClass 9 MathsClass 9 Social ScienceQuestion Answers for Class 8Class 8 ScienceClass 8 EnglishClass 8 MathsClass 8 Social ScienceQuestion Answers for Class 7Class 7 ScienceClass 7 EnglishClass 7 MathsClass 7 Social ScienceQuestion Answers for Class 6Class 6 ScienceClass 6 EnglishClass 6 MathsClass 6 Social ScienceQuestion Answers for Class 5Class 5 ScienceClass 5 EnglishClass 5 MathsClass 5 Social ScienceQuestion Answers for Class 4Class 4 ScienceClass 4 EnglishClass 4 MathsWhat is the lone pair of electrons? Explain with an example.AnswerVerified590.4k+ viewsHint: Unshared electrons in bonding are called lone pairs. Lone pairs are found in the outermost electron shell of atoms. Complete answer:A pair of electrons occupying an orbital in an atom or molecule and not directly involved in bonding is called lone pair. A lone pair refers to a pair of valence electrons that are not shared with another atom in a covalent bond and is sometimes called an unshared pair or nonbonding pair. To calculate the lone pair first we have to calculate the number of hybrid orbitals or hybridization The formula used to calculate lone pairs = ${\dfrac{Number\; of\; valence\; shell\; electrons\; of \;central\; atom - \; Number\; of\; electrons\; taking\; part\; in\; bonding}{2}}$...............................(i)Let us use this formula to calculate the number of lone pairs.Take the example of $Xe{F_2}$. Calculate the number of lone pairs in Xe. In this case Xe has eight electrons in the outermost shell and fluorine has seven electrons in the outermost shell. So two electrons of Xe and F are involved in formation of bonding with each other.Thus, Number of valence shell electrons around central atom = 8Number of electrons taking part in bonding = 2Put the values in Equation (i),Lone pairs = ${\dfrac{8 - 2}{2}}$ = $\dfrac{6}{2}$ = 3Thus the number of lone pairs in Xe are = 3 Note: When a compound having lone pair then the bond angle decreases due to repulsion between lone pair and lone pair hence lone pair effect the geometry also. The lone pair - lone pair repulsions are maximum comparative to lone pair - bond pair and bond pair - bond pair. Recently Updated PagesMaster Class 11 Business Studies: Engaging Questions & Answers for SuccessMaster Class 11 Computer Science: Engaging Questions & Answers for SuccessMaster Class 11 Economics: Engaging Questions & Answers for SuccessMaster Class 11 Social Science: Engaging Questions & Answers for SuccessMaster Class 11 English: Engaging Questions & Answers for SuccessMaster Class 11 Chemistry: Engaging Questions & Answers for SuccessMaster Class 11 Business Studies: Engaging Questions & Answers for SuccessMaster Class 11 Computer Science: Engaging Questions & Answers for SuccessMaster Class 11 Economics: Engaging Questions & Answers for SuccessMaster Class 11 Social Science: Engaging Questions & Answers for SuccessMaster Class 11 English: Engaging Questions & Answers for SuccessMaster Class 11 Chemistry: Engaging Questions & Answers for Success

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