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Elements that appear in the same column of the periodic table often share similar chemical properties....

Elements that appear in the same column of the periodic table often share similar chemical properties. In the case of the alkaline earth metals, this is troublesome since the body treats calcium (necessary for proper bone growth) and radium (a radioactive element) as chemically similar, storing both in bone marrow. The radium then bombards nearby bone cells with alpha particles, causing them to "crumble." Radium poisoning investigations often center on the identification of radium and its isotopes in bone samples using a mass spectrometer. Pictured is a schematic of a simplified mass spectrometer that shows the paths of calcium isotopes, barium (another alkaline earth metal) isotopes, and radium isotopes entering the chamber. The region shown is immersed in a constant magnetic field of 0.452 T pointing out of the plane of the schematic. Motion of the positively-charged isotopes toward the right was initiated by a potential difference of 2.670×103 V on the two plates shown.

Using the data shown in the table, calculate the path radius (in meters) of the Ca+ ion.

Using the same data table, match the particles to their path label. (path a, b, c, d, e, f, g)

Answer bank: Ba2+, Ca 2+, Ra+, Ra3+, Ba+, Ra2+, Ca2+

Thanks!

Isotope Mass (×10−25 ??)
Charge (×10−19 ?
)
Ca+
0.666
+1.602
Ca2+
0.666
+3.204
Ba+
2.28
+1.602
Ba2+
2.28
+3.204
Ra+
3.75
+1.602
Ra2+
3.75
+3.204
Ra3+
3.75
+4.806

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genius_generous answered 2 years ago
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