Mass-to-charge ratio refers to the molecular or atomic mass number and "z" to the charge number of the ion; however, the quantity of "m"/"z" is dimensionless by definition. An ion of 100 atomic mass units ("m" = 100) carrying two charges ("z" = 2) will be observed at "m"/"z" = 50. In the 19th century, the mass-to-charge ratios of some ions were measured by electrochemical methods. In 1897, the mass-to-charge ratio of the electron was first measured by J. J. Thomson. By doing this, he showed that the electron was in fact a particle with a mass and a charge, and that
Eliza (given name) Eliza (given name) Eliza is a female given name in English, meaning "My God is an oath". The name first developed as a diminutive of Elizabeth in the 16th century and its use as an independent name started in the 18th century. The name Elizabeth has been around since the Middle Ages, mainly popularised by the French (using the spelling Elisabeth). Elizabeth with a “z” is the typical spelling in English. Elizabeth is found in the Bible (Luke 1:57) as the mother of John the Baptist. Elizabeth became popularised during the late medieval period as a given name, mostly influenced