More than one hundred years ago, Henri Becquerel discovered that uranium emitted penetrating rays similar to those used by Wilhelm Röntgen to take the first X-ray image (of his wife’s hand), starting ...

A New Science. The beginnings. The setting ; Rays and radiation ; Becquerel's discovery -- The Curies. Maria Skłodowska ; A consequential meeting ; New elements! -- Rutherford, Soddy, particles, and ...

Radioactivity is defined as the release of energy by means of radiation in atoms. It was first discovered in the year 1896 by Henri Becquerel, who carried out further experiments in conjunction with ...

On February 26, 1896, Henri Becquerel stored a photographic plate with uranium salts lying on top of it. He intended to later perform an experiment on phosphorescent emissions stimulated by the Sun.

Radioactivity figures large in the public consciousness in 2011, but many chemists may think it matters little to their work, if at all. Introductory chemistry classes taught us the names of the most ...