Question

the curie, which is the unit used to express the amount of radioactivity produced by an element, is based on the amount of disintegrations per second undergone by 1 g of pure uranium. pure hydrogen. pure helium. pure radium. question 4 6 pts who discovered radioactivity? curie roentgen becquerel geiger

Explanation:

The curie is defined as the radioactivity of 1 gram of pure radium. Radioactivity was discovered by Henri Becquerel in 1896.

Answer:

First question: D. pure radium.
Second question: C. Becquerel.