Which type of particle has neither mass nor charge?

• A. Proton
• B. Alpha particle
• C. Gamma ray
• D. Beta particle

Answer: (C)

Verified step by step guidance

1. Understand the properties of each particle listed: proton, alpha particle, beta particle, and gamma ray.
2. Recall that a proton has a positive charge and a definite mass.
3. Know that an alpha particle consists of 2 protons and 2 neutrons, so it has mass and a positive charge.
4. Recognize that a beta particle is an electron or positron, which has a very small mass and a negative or positive charge.
5. Identify that a gamma ray is a form of electromagnetic radiation, which has no mass and no charge.