Question

31) The mass of an electron is approximately 1/1836

times the mass of
A) 1/1H
B) 2/1H
c) 3/1H
D) 4/2He

Answer 1

`(_(1) ^ {1}\textrm{H})` is the correct choice that is option A.

Step-by-step explanation:

An electron has
`(1)/(1836)` times the mass of a proton, but an equal and opposite negative charge.

Lets
`_(A)^(Z)\textrm{X}` is any element represented here.

Where
`Z` is the number of protons as well as its atomic number.

And

`A` is the mass number which is the number of protons and neutrons in any atom.

Note: We know that Hydrogen
`(_(1) ^ {1}\textrm{H})` is devoid of neutron,so number of neutrons in a Hydrogen atom is zero.

Then

`(_(1) ^ {1}\textrm{H})` is also a representation of single proton.

So
`(_(1) ^ {1}\textrm{H})` is the right choice that is option A.