question_answer

De-Broglie wavelength associated with the hydrogen atom moving with most probable velocity at \[27{}^\circ C\] is \[1.26\overset{\text{o}}{\mathop{\text{A}}}\,\]. De-Broglie wavelength associated with helium atom moving with r.m.s. velocity at \[51{}^\circ C\] is:

A) \[2.268\overset{\text{o}}{\mathop{\text{A}}}\,\]

B) \[1.852\overset{\text{o}}{\mathop{\text{A}}}\,\]

C) \[0.5\overset{\text{o}}{\mathop{\text{A}}}\,\]

D) \[0.7\overset{\text{o}}{\mathop{\text{A}}}\,\]