What was the first element discovered by Marie and Pierre Curie?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. Polonium
They announced its discovery in July 1898, naming it after Marie Curie's native country, Poland. This groundbreaking discovery came from their meticulous work with pitchblende, a uranium-rich mineral, which they found to be far more radioactive than pure uranium itself. This led them to hypothesize the existence of new, highly radioactive elements within the ore. They later discovered Radium in December of the same year.