Identify a monoatomic molecule.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Helium.
Helium is a monoatomic molecule, meaning it exists as single atoms in its natural state. Being a noble gas, helium is chemically inert and does not form bonds with other atoms under normal conditions.
Other options like carbon monoxide (CO), oxygen (O₂), and chlorine (Cl₂) are diatomic molecules, as they consist of two atoms bonded together.
Helium's monoatomic nature makes it unique and ideal for applications like cryogenics and as a lifting gas.