The temperature of an ideal gas in 3-dimensions is 300 K. The corresponding de-Broglie wavelength of the electron approximately at 300 K, is :
[me = mass of electron = 9 × 10–31 kg
h = Planck constant = 6.6 × 10–34 Js
kB = Boltzmann constant = 1.38 × 10–23 JK–1]
(1) 6.26 nm
(2) 8.46 nm
(3) 2.26 nm
(4) 3.25 nm