Transmutation is the process of transforming one element into another through nuclear reactions. What will be the nuclide produced when Cf-249 is bombarded with C-12? Four neutrons are also produced by the reaction.

Transmutation involves the addition of particles to the element. In this case, Cf-249 is bombarded with C-12 producing a product and an additional of four neutrons. So,

249Cf + 12C - - - > 261Rf + 4 1n0

Therefore, the element produced through the transmutation of Cf-249 is Rf-261 or Rutherfordium 261.