Velocity of helium atom at 300K is 2.40 xx 10^2 meter per second. What is its wavelength? (He = 4)

Velocity of helium atom at 300K is 2.40 xx 10^2 meter per second. What

1.	Velocity of helium atom at 300K is 2.40 xx 10^2 meter per second. What is its wavelength? (He = 4)
Answer» 0.416 nm 0.83 nm 803 Å 8000 Å Solution :`LAMBDA = (6.625 XX 10^(-34))/(4xx 67 xx 10^(-27) xx 2.4xx10^2)= 0.416 nm`