avoirdupois spectrometer GeV kilodaltons RG250 monoisotopic squark mQund0 1Qp00794 Sclerotic 15Qp9994 molar QQuadrupole decimeter Botomian kilogram Babuganj muonium Kilogram mol TeV Sequest c2 spectrometers 1kg FLRW superpartners planck mc2 dimensionful