Which of the following elements has the same molecular mass as its atomic mass

Nitrogen

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Oxygen

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Chlorine

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Neon

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Solution

The correct option is D Neon
Neon is an element having the same molecular mass as its atomic mass.
Oxygen, nitrogen and chlorine exist as diatomic molecule. Hence molecular mass becomes double of their atomic mass. Whereas neon has a noble gas configuration and it exists in monoatomic state.

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