Which exist as diatomic molecule at room temperature ?
A
Alkali metals
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B
Alkaline earth metals
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C
Noble gases
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D
Halogens
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E
Transition metals
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Solution
The correct option is D Halogens Halogens exist as diatomic molecules at room temperature. Thus, we have F2,Cl2,Br2 and I2 molecules. They share one electron each to form a covalent bond.