A Mass spectrometer is a device originally used for sorting out isotopes of atom

Question

A Mass spectrometer is a device originally used for sorting out isotopes of atoms. Given design perameters like singly ionized, accelerating voltage=10 kilo volts, Bfield=3T and trajectory of a half circle. consider sodium(NA23, 11P, 12N, stable) and a major isotope ( NA24 11P, 13N, unstable 1/2 life of 15 hours - B decay to MG24). Assuming a sample that has a mix of NA23 and NA24 atoms. Assuming singly-ionized - fill in the following: NA23 mass=_______kg, charge=_____c? NA24 mass=_______kg, charge=__________c? As they leave the accelerating E field the atoms will be moving at NA23=_______m/s? NA24=______m/s? They enter the B field and half circle around. Find the spacing between the two atoms as seen at the detector. s=_______m?

Explanation / Answer

Na - 23   mass = 22.9898 u = 38.1746 e-27 kg

Na-24     mass = 23.9910 u = 39.8371 e-27 kg

both are sinmgly ionised atom and carry a charge of Qe , equal to the charge of an electron

charge q = 1.609e-19 C

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