Question

velocity of electron in third shell of lithium positive is. Their options are a) 1/137 b) 1/274 c) 2/137 D) 1/3into137​

Answer 1

Answer:

v = 1/137 c

please read this explanation below ....

Explanation:

# Given -

For 3rd shell of Li, Z = 3 & n = 3

Speed of electron in nth orbit of atom is given by

v = Ze² / 2εnh

Substitute values,

v = 3 × (1.6×10^-19)^2 / (2 × 8.85×10^-12 × 3 × 6.6×10^-34)

v = 2.19×10^6 m/s

Speed of this electron with speed of light will be -

v/c = 2.19×10^6 / 3×10^8

v/c = 0.0073

v = 0.0073 c

v = 1/137 c

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