# Question

A Rutherford scattering experiment is performed on a gold foil target with alpha beams of two different kinetic energies, one of 3.00MeV, the second of 6.00 MeV. Qualitatively compare the distance of closest approach (rmin) for the two different energy alpha beams. Give a numerical answer as a ratio of the closest approach for the more energetic alphas to that of the less energetic ones.

## Answer to relevant Questions

Determine the number of protons, neutrons, and electrons in a neutral atom with the following nuclei: (a) 90Zr and (b) 208Pb. Complete the following nuclear decay equations by filling in the blanks: A alpha source gives off alpha particles each with a kinetic energy of 2.78 MeV. At what rate (in watts) is kinetic energy being produced? Francium-223 (22387FR) has a half-life of 21.8 min. (a) How many nuclei are initially present in a 25.0-mg sample of 22387FR? (b) What is its initial activity? (c) How many nuclei will be present 1 h and 49 min later? ...Use Avogadro’s number (Section 10.3) to show that 1u = 1.66 x 10-27kg.Post your question

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