Investigated the nature of electrical discharges in gases, and invented the Crookes Tube and the Crookes Radiometer.
Bombarded beryllium with alpha particles which created a beam with high penetrating power. This beam mistaken-ed for gamma rays actually led to the discovery of the neutron by James Chadwick
A Crookes Tube is an early experimental electrical discharge tube, with partial vacuum, invented by English physicist William Crookes.
Catherine, Emma, Mabel, Rachel POINTS
Marie and Pierre Curie
-1935 won Nobel Prize in Chemistry for the discovery of artificial radioactivity