Grade 12 Physics help pl0x
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Grade 12 Physics help pl0x

[From: ] [author: ] [Date: 11-06-08] [Hit: ]
the ratio of the radii ( Fe^3+ / Fe^2+) is sqrt(2/3) => Fe^2+ has the largeR (not largest!) radius.......
A sample of two different iron ions, Fe^2+ and Fe^3+, are accelerated by the same potential and sent through the uniform magnetic field of a mass spectrometer. a)Which ions moves faster after being accelerated. Justify with relevant equations. b)Which ion follows the path with the largest radius. Justify your answer.

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E =QV = (1/2)mv^2 => v = sqrt(2QV/m) => Fe^3+


F = QvxB, the ratio of the radii ( Fe^3+ / Fe^2+) is sqrt(2/3) < 1 => => Fe^2+ has the largeR (not largest!) radius.
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