Electrons are _______ charged
Negatively
Understanding Electron Charge
Electrons are fundamental particles that are part of an atom. Atoms are the basic building blocks of all matter around us. An atom is typically made up of a nucleus at the center and electrons orbiting the nucleus. The nucleus contains protons and neutrons.
Each of these subatomic particles has a specific electrical charge:
- Protons: Found in the nucleus, they carry a positive charge. The charge of a proton is approximately \(+1.602 \times 10^{-19}\) Coulombs (C).
- Neutrons: Also found in the nucleus, they carry no electrical charge. They are neutral.
- Electrons: These particles orbit the nucleus and carry a negative charge. The charge of an electron is equal in magnitude but opposite in sign to that of a proton, approximately \(-1.602 \times 10^{-19}\) Coulombs (C).
The question asks about the charge of electrons. Based on the fundamental properties of subatomic particles, electrons are indeed negatively charged.
| Particle | Location | Electric Charge |
|---|---|---|
| Proton | Nucleus | Positive (\(\texttt{+}\)) |
| Neutron | Nucleus | Neutral (\(\texttt{0}\)) |
| Electron | Orbiting nucleus | Negative (\(\texttt{-}\)) |
Because electrons carry a negative charge, they are attracted to the positively charged protons in the nucleus via electrostatic forces. This attraction is what keeps the electrons bound to the atom. The movement of these negatively charged electrons is what constitutes electric current in many materials, like metals.
Therefore, the correct answer identifying the charge of electrons is that they are negatively charged.
Revision Table: Key Electron Facts
| Concept | Description |
|---|---|
| Electron Charge Type | Negative |
| Location in Atom | Orbits the nucleus |
| Magnitude of Charge | Same as proton, opposite sign (\(\texttt{e} \approx 1.602 \times 10^{-19}\) C) |
| Role in Matter | Determines chemical bonding, causes electric current |
Additional Information: Atomic Charge
In a neutral atom, the number of electrons is equal to the number of protons. Since protons are positively charged and electrons are negatively charged with equal magnitude of charge, their charges cancel out, resulting in a net charge of zero for the atom.
Atoms can gain or lose electrons, forming ions.
- If an atom loses electrons (which are negative), it will have more protons than electrons and will become a positively charged ion, called a cation.
- If an atom gains electrons (which are negative), it will have more electrons than protons and will become a negatively charged ion, called an anion.
Understanding the negative charge of electrons is crucial for comprehending atomic structure, chemical bonding, and electricity.
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