To arrange the subatomic particles from lightest to heaviest, we need to compare their masses:
- Mass of the electron: \(9.109 \times 10^{-31}\) kg
- Mass of the proton: \(1.672 \times 10^{-27}\) kg
- Mass of the neutron: \(1.675 \times 10^{-27}\) kg
Now, we can compare the numbers:
- Electron: \(9.109 \times 10^{-31}\) kg
- Proton: \(1.672 \times 10^{-27}\) kg
- Neutron: \(1.675 \times 10^{-27}\) kg
Since \(9.109 \times 10^{-31}\) is the smallest, followed by \(1.672 \times 10^{-27}\), then \(1.675 \times 10^{-27}\), the correct arrangement from lightest to heaviest is:
Electron < Proton < Neutron.