page_title: Mass (mass spectrometry)
hierarchical_section_title: Mass (mass spectrometry)
caption_attribution_description: Español: En la esquina inferior derecha de esta placa fotográfica son marcados por los dos isótopos del neón: neón - 20 y neón - 22. English: In the lower right corner of the photographic plate are the tracks left by two isotopes of neon: neon-20 and neon-22.
context_page_description: The mass recorded by a mass spectrometer can refer to different physical quantities depending on the characteristics of the instrument and the manner in which the mass spectrum is displayed.
context_section_description: The mass recorded by a mass spectrometer can refer to different physical quantities depending on the characteristics of the instrument and the manner in which the mass spectrum is displayed.
caption: J. J. Thomson discovered the isotopes of neon using mass spectrometry.
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