Question

26. All of the following terms are associated with the atom. Which one has the smallest mass?
(a) electron
(b) proton
(c) neutron
(d) nucleus

Answer 1

Answer:

neutron has the smallest mass

Answer 2

Answer:

The correct is option (a) Electron.

Explanation:

• The electrons are very small.
• The mass of an electron will be approximately $\frac{1}{2000}$ the mass of either a proton or a neutron.
• The mass (kg) of an electron is $9.1 * 10^{-31}kg$.
• The relative mass (u) in electron is $5.5 * 10^{-4}u$.
• This makes electrons almost massless.
• An electron carries a relative charge of $-1$ .
• The charge on an electron is $-1.6*10^{-19}C$.

Conclusion:

Electrons have the smallest mass.