Which one of the following does not consist of charged particles of matter?

Options

A. `alpha`-particle
B. `beta`-rays
C. `gamma`-rays
D. Anode rays

Explanation

To solve the question "Which one of the following does not consist of charged particles of matter?", we can analyze each option provided in the context of nuclear chemistry.

### Step 1: Identify the options
We need to consider the following types of rays or particles:
1. Alpha rays
2. Beta rays
3. Anode rays
4. Gamma rays

### Step 2: Analyze each type of ray/particle
- **Alpha rays (Alpha particles)**: These are positively charged particles, specifically helium nuclei (He²⁺), which consist of 2 protons and 2 neutrons. Therefore, alpha rays consist of charged particles.

- **Beta rays**: These are negatively charged particles, typically electrons (e⁻). Beta rays carry a negative charge, indicating that they consist of charged particles.

- **Anode rays**: These rays are composed of positively charged ions produced at the anode in a discharge tube. They consist of charged particles as well.

- **Gamma rays**: Unlike the other three, gamma rays are electromagnetic radiation and do not consist of charged particles. They are neutral and do not have any mass or charge.

### Step 3: Conclusion
From the analysis above, we can conclude that the only type of ray that does not consist of charged particles is **gamma rays**.

### Final Answer
**Gamma rays do not consist of charged particles of matter.**

---