round up given mass to a whole number



Hence our answer is Rhodium-103
Explanation:
this is the one i found.....
During a phenomenon called beta decay the neutron of the isotope uranium 237 emits/releases an electron causing an increase of atomic number. With the reference of a periodic table the "new" element is Neptunium or Np-237.
I know water will change the shape to match the container its in if that is your question