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.
These numbers let you decode the date of manufacture of the tire. The first two numbers indicate the week; the last two the year. For example, 0510 indicates the tire was produced in the fifth week of 2010. Subtract the tire manufacture date from the current date to determine the tire's age.To get the month of manufacture, divide the weeks by 4.3. If it is October 2010 and the tire was manufactured in the twenty-fifth week of 2008, the tire's production month was June, making the tire two years and four months old.hese numbers let you decode the date of manufacture of the tire. The first two numbers indicate the week; the last two the year. For example, 0510 indicates the tire was produced in the fifth week of 2010. Subtract the tire manufacture date from the current date to determine the tire's age.