Which Subatomic Particle Has a Negative Charge? Quick Answer
The electron is the subatomic particle that carries a negative electric charge. It is one of the three main components of an atom, alongside the positively charged proton and the neutral neutron.
What Makes the Electron Different
Electrons are elementary particles, meaning they are not made of smaller components Wikipedia. Their negative charge is a fundamental property, measured as approximately -1.602 × 10⁻¹⁹ coulombs. This charge is equal in magnitude but opposite in sign to the positive charge of a proton.
Electrons occupy the space around an atom’s nucleus, forming an electron cloud. Their negative charge creates an electromagnetic attraction to the positive nucleus, which holds the atom together. For example, a hydrogen atom has one proton in its nucleus and one electron orbiting it. Because the charges are balanced, the atom is electrically neutral. If the atom loses that electron, it becomes a positively charged ion.
Electrons are much lighter than protons or neutrons. Their mass is about 1/1836 that of a proton, which is why they contribute almost nothing to an atom’s total mass. Despite their low mass, electrons determine most of an atom’s chemical behavior Encyclopædia Britannica.
Static electricity is a direct result of electron transfer. When you rub a balloon against your hair, electrons move from your hair to the balloon. The balloon gains a negative charge, and your hair becomes positively charged. Electric current in a wire is also the flow of electrons. In a copper wire, electrons move from atom to atom when a voltage is applied Royal Society of Chemistry.
Key Takeaways
- The electron is the subatomic particle with a negative charge.
- Its charge is equal in strength to the proton’s positive charge but opposite in sign.
- Electrons are elementary particles that orbit the nucleus of an atom.
- The balance between negative electrons and positive protons determines an atom’s overall electrical neutrality.
