Among the following the heaviest subatomic particle is

Options

A. Electron
B. Neutron
C. Proton
D. Positron

Answer

To determine the heaviest subatomic particle among the given options (electron, neutron, proton, and positron), we need to compare the masses of each particle.

### Step-by-Step Solution:

1. **Identify the Mass of Each Particle**:
- **Electron**: The mass of an electron is approximately \(9.1 \times 10^{-28}\) grams.
- **Proton**: The mass of a proton is approximately \(1.67 \times 10^{-24}\) grams.
- **Neutron**: The mass of a neutron is approximately equal to that of a proton, which is also around \(1.67 \times 10^{-24}\) grams.
- **Positron**: The mass of a positron is the same as that of an electron, which is \(9.1 \times 10^{-28}\) grams.

2. **Compare the Masses**:
- **Electron**: \(9.1 \times 10^{-28}\) grams
- **Positron**: \(9.1 \times 10^{-28}\) grams
- **Proton**: \(1.67 \times 10^{-24}\) grams
- **Neutron**: Approximately \(1.67 \times 10^{-24}\) grams

3. **Determine the Heaviest Particle**:
- Comparing the values, both the proton and neutron have the same mass, which is significantly greater than that of the electron and positron.
- Therefore, the heaviest subatomic particle among the options is either the proton or the neutron. However, since the proton is slightly heavier than the neutron, we can conclude that the heaviest subatomic particle is the **proton**.

### Final Answer:
The heaviest subatomic particle is the **proton**.