Question

Properties of electron...

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Answer 1

$\huge\mathfrak\purple{Hello\:dear...}$

ANSWER:

$\large\bold\green{ELECTRONS\::-}$

• Negatively charged material particles constituting cathode rays is called electrons.

OR

• Negatively charged subatomic particles of an atom is known as electrons.

=> Properties of $\large\bold{ELECTRONS}$ are as follows:

1. Charges/mass ratio is = 1.76 × 10¹¹ coulomb/kg [value here is constant]
(Discovered by J.J. Thomson via the experiment of deflection of cathode rays)

2. Charge (e) on an electron = 1.6 × 10^-19 coulomb or 1.67 × 10^-19 coulomb
(Discovered by R.A. Millikan via oil drop experiment)

3. Mass of electron = e / e/m = m
= 1.6 × 10^-19 / 1.76 × 10¹¹
= 9.1 × 10^-31 kg
that is equal to 1/1840 times the mass of proton.

4. Mass of electron is independent of nature of gas present in the discharge tube i.e., mass of electron of every element is same.

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