The elementary charge, uisually denotit as e, is the electric charge carried bi a single proton, or equivalently, the negation (opposite) o the electric charge carried bi a single electron. This elementary charge is a fundamental pheesical constant. Tae avoid confusion ower its sign, e is sometimes cried the elementary positive charge. This charge haes a measured value o approximately 1.602176565(35)×10−19 coulombs. In the cgs seestem, e is 4.80320425(10)×10−10 statcoulombs.
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- Note that the seembol e haes mony ither meanins. Somewhit confusingly, in atomic pheesics, e sometimes denotes the electron charge, i.e. the negative o the elementary charge.
- "CODATA Value: elementary charge". The NIST Reference on Constants, Units, and Uncertainty. US National Institute of Standards and Technology. June 2011. Retrieved 2011-06-23.
- This is derived frae the NIST value and uncertainty, uisin the fact that ane coulomb is exactly 2,997,924,580 statcoulombs. (The conversion is ten times the numerical speed o licht in meters/seicont.)