Name the scientists who shared the nobel prize in physics in 1903 and describe their contributions that were recognized by the award.

The nobel prize in 1903 was given and awarded to Antoine Henri Becquerel, and Pierre Curie, Marie Curie, nee Sklodowska. 
Reasons for the given awards; 
Antoine Henri Becquerel because; "In recognition of the extraordinary services he has rendered by his discovery of spontaneous radioactivity." 
And the others (Pierre Curie and Marie Curie, nee Sklodowska) because; "In recognition of the extraordinary services they have rendered by their joint researches on the radiation phenomena, discovered by Professor Henri Becquerel."     

The answer should be vaporization 

C, small, hard spheres with insignificant volumes