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
Aya (given name) Aya (given name) Aya is a feminine given name with multiple meanings in different languages. In Old German, Aya means "sword". Aya (あや, アヤ) is a common female Japanese given name meaning "design", "colorful" or "beautiful". Aya is also in use in the Hebrew language and means "to fly swiftly" or "bird". Aya is also an Arabic feminine name written as آية meaning "wonderful", "amazing", "miracle" or "verse" (of the Quran). In Mongolian, similar to Turkish, it means goodness, music and "melody". In Chemehuevi, Aya means "tortoise". In Baoule on the Ivory Coast, Aya is given to the female born