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Which of the following correctly describes how electrons differ from protons and neutrons?
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2. Atoms & Elements
Subatomic Particles
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Which type of particle has neither mass nor charge?
A
Proton
B
Alpha particle
C
Gamma ray
D
Beta particle
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Understand the properties of each particle listed: proton, alpha particle, beta particle, and gamma ray.
Recall that a proton has a positive charge and a definite mass.
Know that an alpha particle consists of 2 protons and 2 neutrons, so it has mass and a positive charge.
Recognize that a beta particle is an electron or positron, which has a very small mass and a negative or positive charge.
Identify that a gamma ray is a form of electromagnetic radiation, which has no mass and no charge.
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