Question 12 (7 points) Listen From the list below, choose the atoms that have only radioactive isotopes. 1) Carbon ( 2) Curium (3) Radium 4) Gold ( 5) Oxygen 0 6) Hydrogen [7) Nitrogen ()8) Bismuth (9) Uranium ( 10) LeadQuestion 13 (7 points) Listen A nucleus of Th-231 undergoes beta decay. Using the equation editor, write the decay equation for this reactionQuestion 14 (7 points) Listen A nucleus of U-235 undergoes alpha decay. Using the equation editor, write the decay equation for this reaction