A proton is a subatomic particle found in the nucleus of an atom that carries a positive electric charge. Its presence, along with neutrons, contributes to the atomic mass of an element.
Atom: The smallest unit of matter that retains the identity of the substance composed of protons, neutrons, and electrons.
Neutron: A neutral (uncharged) subatomic particle found in the nucleus of an atom that contributes to its mass alongside protons but does not affect its electric charge.
Electron: A negatively charged subatomic particle orbiting the nucleus of an atom, balancing the positive charge of protons to determine the chemical properties of an element
Study guides for the entire semester
200k practice questions
Glossary of 50k key terms - memorize important vocab
© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.