Symbols and Units
The IUPAC recommended symbol for mass and charge are m and Q, respectively, however using a lowercase q for charge is also very common. Charge is a scalar property, meaning that it can be either positive (+) or negative (−). The Coulomb (C) is the SI unit of charge; however, other units can be used, such experessing charge in terms of the elementary charge (e). The SI unit of the physical quantity m/Q is kilograms per coulomb.
Read more about this topic: Mass-to-charge Ratio
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