Electron is a particle having a

Options

A. negative charge of one unit and zero mass
B. positive charge of one unit and zero mass
C. negative charge of one unit and a mass of about `9.1 xx 10^(-31) kg`
D. negative charge of one unit and a mass of about `1.67 xx 10^(-27)kg`.

Answer

To answer the question "Electron is a particle having a...", we need to provide a detailed explanation of the properties of an electron. Here’s a step-by-step solution:

### Step 1: Definition of Electron
An electron is a fundamental subatomic particle that carries a negative electric charge.

**Hint:** Remember that electrons are one of the basic building blocks of atoms.

### Step 2: Charge of Electron
The charge of an electron is -1 elementary charge, which is equivalent to approximately -1.602 x 10^-19 coulombs.

**Hint:** Focus on the sign of the charge; it is negative.

### Step 3: Mass of Electron
The mass of an electron is approximately 9.11 x 10^-31 kilograms. This is a very small mass compared to protons and neutrons.

**Hint:** Note that the mass of an electron is significantly less than that of protons and neutrons.

### Step 4: Behavior of Electron
Electrons exhibit both particle-like and wave-like properties, a concept known as wave-particle duality.

**Hint:** Consider how electrons can behave differently under various experimental conditions.

### Step 5: Location in Atom
Electrons are found in the electron cloud surrounding the nucleus of an atom, which contains protons and neutrons.

**Hint:** Visualize the atom as having a nucleus at the center with electrons orbiting around it.

### Step 6: Summary of Properties
To summarize, an electron has:
- A negative charge of -1 unit.
- A mass of approximately 9.11 x 10^-31 kg.
- It behaves as both a particle and a wave.
- It orbits the nucleus of an atom.

**Hint:** Make a list of these properties for quick reference.

### Final Answer
Therefore, the complete statement would be: "Electron is a particle having a negative charge of -1 unit and a mass of approximately 9.11 x 10^-31 kg."