A Level Physics Practice Exam

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Study for the A Level Physics Exam. Our quiz features flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly!

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Which particle is known to have a negative charge?

Proton
Neutron
Electron
Positron

The correct answer is: Electron

The electron is recognized as a fundamental particle with a negative charge. In atomic structure, electrons orbit the nucleus, which is composed of protons and neutrons. The electron’s negative charge is essential for the formation of chemical bonds and the overall stability of atoms, as it interacts with the positively charged protons found in the nucleus. Protons have a positive charge, which contrasts with that of electrons and enables electrostatic attraction between them. Neutrons, on the other hand, are neutral particles with no charge, playing a critical role in stabilizing the nucleus alongside protons. A positron, while having the same mass as an electron, carries a positive charge and is considered the electron’s antiparticle. Thus, the designation of the electron as the particle with a negative charge is crucial in understanding the behavior of matter at the atomic level and the interactions between subatomic particles.