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.
Generation Y refers to the population group in the US born from somewhere around 1976 to around 2000. They are sometimes called echo boomers because some of them are the children of baby boomers. On the other hand, some Generation Y children, especially those born in the late 1980s or afterwards, may be the grandchildren of baby boomers. Other names for this group are the Millennials, the Internet Generation, and the abbreviated Gen Y or Gen Yers.