IDNLearn.com offers a collaborative platform for sharing and gaining knowledge. Get the information you need from our experts, who provide reliable and detailed answers to all your questions.

What was one important discovery that the Curies made?
O A material's radioactivity cannot be changed by altering the material physically
O A material's radioactivity can be weakened or intensified by changing it chemically.
O Radioactive materials generally contain radium or polonium.
O Radioactive materials are found only in the form of salts.