In 1985, he discovered the X-ray through his cathode ray tube experiment.

In 1896, Antoine Henri Becquerel unintentionally discovered radioactivity with the idea of phosphorescence and his photographic plate experiment with the use of the element, ________.

Gamma ray was discovered by Paul Ulrich Villard while studying the radiation emanating from Radium. This happened in ______.

The term radioactivity was actually coined by ___________.

In 1899, Ernest Rutherford showed that radioactive substances emit more than one kind of radiation. He named the less-penetrating emanations _______ and the more-powerful ones ______.

What makes something radioactive?

_______________ is the process by which unstable atoms emit radiation until they become stable.

In order of most to least penetrating radiation we have __________.

Which type of radiation releases an electron?

What particle is released when an unstable isotope undergoes alpha radiation?

Which type of nuclear radiation can be stopped by 60cm aluminum or 7cm of lead?

It is a method of inducing a nuclear reaction wherein a stable isotope are bombarded with high-speed particles such as proton and electrons.

Artificial radioactivity was discovered by husband and wife, Frederic Joliot and Irene Joliot-Curie in 1934.  They made the exciting and important observation that the positrons which was emitted when _______ was bombarded with alpha particles from Po continued to be emitted after the source of alpha particles was removed.

Rutherford was also the first to discover artificially induced radioactivity. 

Through the bombardment of alpha particles against nuclei of N-14, Rutherford produced ______.