One of the important discoveries in chemistry of the last century was the understanding of the atomic shell structure and, in turn, of the periodic properties of elements at the level of quantum ...

A photo-editing program aimed at nonprofessionals needs to serve two audiences: experienced shutterbugs who want advanced digital darkroom features, and casual snap shooters who just want better shots ...

Cesium is a rare, silver-white, shiny metal with brilliant blue spectral lines; the element's name comes from "caesius," a Latin word meaning "sky blue." It is the softest metal, with a consistency of ...