Which of the following elements does NOT usually form molecules and is found in its atomic form?

Correct option is B

• Helium is a noble gas and typically exists in its atomic form. Unlike many elements that form molecules by bonding with other atoms, helium atoms are monatomic because they already have a stable electron configuration (two electrons in its only shell).
• This makes helium chemically inert and it does not readily form molecules.

• Helium belongs to the noble gases group in the periodic table and has a full valence shell, making it stable and non-reactive.

• The atomic form of helium makes it unique compared to other gases like hydrogen or oxygen, which readily form molecular structures (H₂ and O₂, respectively).

• Helium is used in applications requiring inertness, such as in cryogenics, balloons, and aerospace technology.

Additional Information:

• Hydrogen: Hydrogen typically forms H₂ molecules, as it needs to pair with another hydrogen atom to achieve stability.

• Nitrogen: Nitrogen forms N₂ molecules, which are very stable due to the strong triple bond between nitrogen atoms.

• Oxygen: Oxygen forms O₂ molecules, which are essential for respiration and combustion processes.