# Question #e9411

The electron is the least massive of the three subatomic particles making up an atom, having a mass of $9.1093897 \times {10}^{- 31} \text{kg}$. Electrons are negatively charged and located in the electron cloud surrounding the atomic nucleus.
The neutron is the most massive of the subatomic particles making up an atom, having a mass of $1.6749286 \times {10}^{- 27} \text{kg}$, making it about 1839 times more massive than the electron. Neutrons are neutral, having no charge, and are located in the atomic nucleus.