BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A pair of bonding electrons
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One non-bonding electron
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A pair of non-bonding electrons
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A pair of electrons on the central atom
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Detailed explanation-1: -In chemistry, 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 non-bonding pair. Lone pairs are found in the outermost electron shell of atoms. They can be identified by using a Lewis structure.
Detailed explanation-2: -Lone pair (nonbonded pair, nonbonded electron pair): A valence shell electron pair associated with one atom, and not part of a covalent bond. Can be part of a noncovalent interaction. The oxygen atom of water has two lone pairs.
Detailed explanation-3: -The shared pairs of electrons present between the bonded atoms are called bond pairs. All valence electrons may not participate in bonding. The electron pairs that do not participate in bonding are called lone pairs of electrons. For example, in C2H6 (ethane), there are seven bond pairs but no lone pair present.
Detailed explanation-4: -lone pair is a valence electron pair which is not shared with another atom (not take part in bond formation) and is sometimes called a non-bonding pair. Lone pairs are found in the outermost electron shell of atoms.