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Q.

What's the mass of neutron in terms of electrons mass?

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a

1/1838 times of electron's mass

b

1/1832times of electron's mass

c

1838 times of electron's mass

d

1832 times of electron's mass

answer is A.

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Detailed Solution

Clarification: The mass of an electron is0.00054u0.00054u. The mass of a proton is1.00727u1.00727u. The mass of a neutron is1.008671.00867 
u. Then mass of neutron by mass of an electron is1.00867/0.00054=18381.00867/0.00054=1838. Therefore the mass of neutron in terms of the electron is 1838 times.

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