Which elements have 50protons

When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a nudge on. what is the other product

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion