Question

What is radioactive matter?

Answer 1

The matter which emits radiations is called a radioactive matter. e.g platinum, pladium , rudium

Answer 2

One thing that can change in an element is the number of neutrons. ... Isotopes that are unstable, meaning they have an imbalance of neutrons and protons are radioactive. They release this extra energy and over time radioactively decay to a stable isotope. Radioactive materials occur naturally but are also man-made.