Atomic StructureHard
Question
Which is true about an electron ?
Options
A.Rest mass of electron is 9.1 × 10-28 gm
B.Mass of electron increases with the increase in velocity
C.Molar mass of electron in 5.48 × 10-4 gm/mole
D.e/m of electron is 1.7 × 108 coulomb/gm
Solution
me = 9.1 × 10-31 kg = 9.1 × 10-28 g.
m =
(m0 : rest mass ; m : dynamic mass).
As v ↑
↓ ∴ m↑
Molar mass of e = 9.1 × 10-28 × 6.023 × 1023 = 5.48 × 10-4 g/mole.
For electron,
= 1.7 × 108 c/g.
me = 9.1 × 10-31 kg = 9.1 × 10-28 g.
m =
(m0 : rest mass ; m : dynamic mass).As v ↑
↓ ∴ m↑Molar mass of e = 9.1 × 10-28 × 6.023 × 1023 = 5.48 × 10-4 g/mole.
For electron,
= 1.7 × 108 c/g.me = 9.1 × 10-31 kg = 9.1 × 10-28 g.
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