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 options given (electron, neutron, proton, or positron), we will analyze the masses of each particle.

### Step 1: Identify the Mass of Each Subatomic Particle
- **Electron**: The mass of an electron is \(9.11 \times 10^{-28}\) grams.
- **Neutron**: The mass of a neutron is \(1.675 \times 10^{-24}\) grams.
- **Proton**: The mass of a proton is \(1.672 \times 10^{-24}\) grams.
- **Positron**: The positron has the same mass as an electron, which is \(9.11 \times 10^{-28}\) grams.

### Step 2: Compare the Masses
Now, we will compare the masses of the particles:
- Mass of Electron: \(9.11 \times 10^{-28}\) grams
- Mass of Neutron: \(1.675 \times 10^{-24}\) grams
- Mass of Proton: \(1.672 \times 10^{-24}\) grams
- Mass of Positron: \(9.11 \times 10^{-28}\) grams

### Step 3: Determine the Heaviest Particle
From the comparison:
- The mass of the neutron (\(1.675 \times 10^{-24}\) grams) is greater than both the proton (\(1.672 \times 10^{-24}\) grams) and the electron/positron (\(9.11 \times 10^{-28}\) grams).

### Conclusion
The heaviest subatomic particle among the options provided is the **neutron**.