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(b) Explain why not all of the energy from the decay is released as kinetic energy of the alpha particle. (2) (Total for Question 15 = 7 marks)15 A nucleus of polonium-210 decays to lead-206 by emitting an alpha particle. The masses of the particles are shown in the table. Mass/kg Polonium-210 3.48572 x 10-25 DO NOT WRITE IN THIS AREA Lead-206 3.41918 x 10-25 Alpha particle 6.64437 x 10-27 (a) (i) Show that the energy released in the decay is about 9 x 10-13 J. (3) DO NOT WRITE IN THIS ARE (ii) 98% of the energy from the decay is released as kinetic energy of the alpha particle. Calculate the velocity of the alpha particle immediately after the decay. (2) DO NOT WRITE Velocity of alpha particle =