Lewis structure of water The Lewis structures, also called Lewis-dot diagrams or electron dot diagrams are pictures that show the bonding between a pair of electrons and the atoms of a molecule. Each dot represents one electron. Two dots side by side represent a lone pair of electrons. To show a bond between atoms, a line representing a pair of shared electrons is placed between the two atoms.
Or, maybe you're wondering just how old the tires are on the motorcycle you just bought. Here's how to tell: Look on the sidewall of the tire for the DOT symbol. Follow the line of text and numbers after the DOT symbol until you reach the end. If the tire was manufactured in the year 2000 or later, the last 4 digits give the age. The last 2 digits give the year and the preceding 2 digits give the week of manufacture.
An age old, yet nearly forgotten art, is how to tell a horse's age by its teeth. Simply study the pictures below, memorize the special characteristics of each stage. Then go practice on horses that someone knows the age of. See how close you can come to the real age of the horse. 1  When the horse has grown all its permanent teeth it is said to have a full mouth. 2  The age of the horse can be determined with some accuracy by looking at its teeth. 3  As the horse grows and ages the changes that take place can help you tell how old it is.