Question

why were the new substances polonium and radium​

Answer 1

Answer:

They named it after the rays that were emitted from the element. Polonium : Polonium is named after Poland, the native country of Marie Curie. She was the one who first isolated this element.

Answer 2

EXPLANATION:

The substance they named “polonium” behaved chemically about the same as an element that was already known, bismuth, and the substance they named “radium” had about the same chemistry as the element barium. But polonium and radium were different from the known elements in one big way—each was strongly radioactive.