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Diatomic molecules will be Nonpolar when they are composed of only one element.

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Answer:

Diatomic molecules will be nonpolar when they are composed of only one element

Explanation:

A diatomic molecule of a single element like X-X will be nonpolar due to lack of polarization of bonding electrons.

Bond exist between two X atoms will have no polarization because both X atoms have same electronegativity. Therefore both of them attracts bonding electrons towards themselves equally and in opposite direction.

So bonding electrons remain in equal distance from both X nucleus resulting no polarization and hence the diatomic molecule is nonpolar.

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