Covalent bonding is a common type of bonding, in which two or more atoms share up to three valence electrons. In nonpolar covalent bonds, the electronegativity difference between the bonded atoms is small, typically 0 to 0.3. Bonds within most organic compounds are described as covalent.
The Silent Generation refers to people who were born between 1925 and 1945. There are several theories as to where the label 'Silent Generation' originated. The children who grew up during this time worked very hard and kept quiet. It was commonly understood that children should be seen and not heard.
A silent film is a film which consists of only the picture, that is, it has no sound. The idea of combining motion pictures with recorded sound is nearly as old as the motion picture itself, but before the 1920s, most films were silent. The years before sound came to the movies are known as the silent era among film scholars and historians.