Question

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

(a) 1838 times of electron’s mass

(b) 1/1838 times of electron’s mass

(c) 1832 times of electron’s mass

(d) 1/1832 times of electron’s mass

I had been asked this question during an online exam.

I want to ask this question from Discovery of Sub-atomic Particles topic in division Structure of Atom of Chemistry – Class 11

Answer 1

Correct choice is (a) 1838 times of electron’s mass

Explanation: The mass of an electron is 0.00054 u. The mass of a proton is 1.00727 u. The mass of a neutron is 1.00867 u. Then mass of neutron by mass of an electron is 1.00867/0.00054 = 1838. Therefore the mass of neutron in terms of the electron is 1838 times.