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 which can be read at a single sitting. 2. It ought to combine objective matter-of-fact description with poetic atmosphere. 3. It ought to present a unified impression of tone, colour and effect. unity of effect (Poe) 4. It mostly shows a decisive moment of life (which can entail a fatal blow).