NCERT Class XI Chemistry Structure of Atom Solutions

Question : 20

Total: 67

Calculate the wavelength of an electron moving with a velocity of 2.05 × 107ms–1.

Solution:

Wavelength of electron (λ) =

where, h = 6.626 × 10–34 J s (Planck’s constant), m = mass of electron,

−

= velocity of electron
∴ λ =

.626×10−34

9.1×10−31×2.05×107

= 0.355 × 10−10 m = 3.55 × 10−11 m

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