Question

What is the ratio of mass of an electron to the mass of proton?
(A) $ 1:2 $
(B) $ 1:1 $
(C) $ 1:1837 $
(D) $ 1:3 $

Answer 1

Hint : To solve this question one should know the detail of electron and proton respectively. Electron is the particle present in the outer orbit of the atom whereas proton is the particle present in the nucleus of the atom. The mass of the atom is basically the sum of the total mass of proton and neutron of the atom. Electron is the lightest particle of the atom and majorly decides the chemical stability and reacting state of the atom. The mass of an electron is much lesser than the mass of the proton of an atom. We know that ratio is obtained by dividing the mass of the electron by the mass of the proton and hence we get the required result.

Complete Step By Step Answer:
Let us consider, $ {m_e} $ is equal to the mass of the electron and $ {m_p} $ is equal to the mass of the proton.
Now, according to their mass we can write, $ \dfrac{{{m_e}}}{{{m_p}}} = \dfrac{{9.10938356 \times {{10}^{ - 31}}}}{{1.6726219 \times {{10}^{ - 27}}}} $
 $ = 1/1836.15267343 $
That means we can say the write answer is option number C.

Note :
We know that, A proton is a subatomic molecule with a mass characterized as 1 and a charge of +1 (positive charge). A proton is demonstrated by either the image p or p+. The core of each iota contains protons. The quantity of protons of a particle of a component is its nuclear number. We also have to keep in our mind that a proton is a decidedly charged subatomic molecule inside the nuclear core of particles. The quantity of protons in the nuclear core is the thing that decides the nuclear number of a component, as shown in the occasional table of the components.