Charged particle

In physics, a charged particle is a particle with an electric charge. It may be an ion, such as a molecule or atom with a surplus or deficit of electrons relative to protons. It can be the electrons and protons themselves, as well as other elementary particles, like positrons. It may also be an atomic nucleus devoid of electrons, such as an alpha particle, a helium nucleus. Neutrons have no charge. Plasmas are a collection of charged particles, atomic nuclei and separated electrons, but can also be a gas containing a significant proportion of charged particles. Plasma is called the fourth state of matter because its properties are quite different from solids, liquids and gases.

Examples

Positively charged particles

• protons and atomic nuclei
• positrons (antielectrons)
• alpha particles
• positive charged pions
• cations

Negatively charged particles

• electrons
• antiprotons
• muons
• tauons
• negative charged pions
• anions

Neutrally charged particles

• neutrons
• photons
• neutrinos
• neutral pions

References

^{[1][2][3][4][5]}

External links

1. ↑ "Ionizing radiation" (PDF). Archived from the original (PDF) on 2015-10-11. 
2. ↑ "Specific Ionization & LET". www.mun.ca. Retrieved 2016-06-21. 
3. ↑ "α입자와 물질과의 상호작용". Radiation & biology & etc. Retrieved 2016-06-21. 
4. ↑ "7_1.3 The Bragg Curve". www.med.harvard.edu. Archived from the original on 2016-03-01. Retrieved 2016-06-21. 
5. ↑ "range | particle radiation". Encyclopædia Britannica. Retrieved 2016-06-21.