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.
Definition of Plot. The plot of a story consists of the events that occur during the course of that story and the way in which they are presented to the reader. The plot is also sometimes referred to as the storyline.