study guides for every class
that actually explain what's on your next test
Electron
from class:
Biology for Non-STEM Majors
Definition
An electron is a subatomic particle with a negative electric charge. It orbits the nucleus of an atom in various energy levels or shells.
congrats on reading the definition of electron. now let's actually learn it.
5 Must Know Facts For Your Next Test
- Electrons are much smaller in mass compared to protons and neutrons.
- The arrangement of electrons around an atom determines its chemical properties and reactivity.
- Electrons can gain or lose energy by moving between different energy levels or orbitals.
- In chemical reactions, atoms often gain, lose, or share electrons to achieve a full outer shell of electrons.
- Electron pairs form covalent bonds between atoms in molecules.
Review Questions
- What is the charge of an electron?
- How do electrons affect the chemical properties of an atom?
- What happens when an electron moves between energy levels?
"Electron" also found in:
© 2025 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.