- #1

Karagoz

- 52

- 5

## Homework Statement

In a mass spectrometer, a few

^{12}

_{6}C ions are deflected with a radius of 12.9 cm. The ions have a speed of 5.67*10^4 m/s when they enter the field. The magnetic field has a strength of 3.2*10^-2 T. The charge of these ions must be ...

SOLUTION:

SOLUTION:

We use the formula: i

*F=qvB*=

*mv*2/

*r*and find q.

*q= mv / rB*= (14*1,66·10^-27 kg * 5,67*10^4 m/s) / (0,129m * 3,2*10^-2 T) = 3,2*10^-19 C = 2e

## Homework Equations

One atomic unit is 1,66*10^-27 kg

But isn't the mass of

^{12}

_{6}C atom is ca 1.99264654*10^-26 kg, which is ca 12 atomic units? ( https://www.britannica.com/science/atomic-mass )

Where does the 14 come from in the solution?