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Rutherford's Model of an Atom

The mass of 1...

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{ The mass of }1 mole of electrons is (mass of }1 electron }}{ is }9.1×10^{-31}kg)

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The total mass of 1mole electron is (mass of 1e-=9.1*10^-28g)

Q. The kinetic energy of an electron is

4.55 \times 10^{- 25} J

.The mass of electron is

9.1 x 10^{- 31} kg

.The velocity of the electron is .

Q. A moving electron has

2.8 \times 10^{- 25} J

of kinetic energy. Its wavelength is:
(Mass of electron

= 9.1 \times 10^{- 31} k g

Q. Calculate the wavelength of an electron if its kinetic energy is

3.0 \times 10^{- 25} J

. Mass of an electron is

9.1 \times 10^{- 31} K g

Q. The mass of the electron is given

9.1 \times 10^{- 31} k g

. Find the order of magnitude of the number of electrons of

1 k g

.

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Rutherford's Model of an Atom

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