Valence electrons. 1  The highest principal shell of an atom, in which there is at least one electron, is called the valence shell. 2  The electrons on the valence shell are called valence electrons. 3  Main group elements can hold a maximum of eight electrons in their valence shell. A full valence shell is known as an octet.
Novella. A novella is a written, fictional, prose narrative normally longer than a short story but shorter than a novel. The English word novella derives from the Italian word novella, feminine of novello, which means new. The novella is a common literary genre in several European languages.
A short story is a piece of prose fiction that can be read in one sitting. Emerging from earlier oral storytelling traditions in the 17th century, the short story has grown to encompass a body of work so diverse as to defy easy characterization. At its most prototypical the short story features a small cast of named characters, and focuses on a self-contained incident with the intent of evoking a single effect or mood. In doing so, short stories make use of plot, resonance, and other dynamic c