What does polonium and thorium do?

Her husband, Pierre Curie, worked with Marie Curie when they discovered Polonium. The Curies also discovered that Thorium, discovered in 1829 by Jöns Jakob Berzelius, emits radiation.

because Madame Curie wanted to name the element after her home country, Poland.

Thorium: symbol Th, natural chemical element, solid, metal, radioactive, atomic number 90, actinoids family. Thorium can be used in nuclear power reactors - as precursor of 233U.

Because she wanted to call it polonium for her hometown, Poland.

Data about the hardness of polonium don't exist.