2.
Choose the monoatomic molecule from the bracket.
(Hydrogen, Oxygen, Helium, Nitrogen)
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Answer:
Helium
Explanation:
Nitrogen(N2), Hydrogen(H2) and Oxygen (O2)are diatomic molecules as every molecule of the above gases is made up of two atoms each. Whereas Helium, being a noble gas having stable duet configuration exist independently as a monoatomic molecule
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