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.
Before you think about training make sure you have a valid licence. With a full car licence you can learn on bikes up to 125cc. Otherwise you will need to apply to DVLA for provisional motorcycle entitlement to be added.A provisional bike licence is valid until 70 years of age (if supported by a C.B.T certificate). Also make sure that your licence has your current address on it.efore you think about training make sure you have a valid licence. With a full car licence you can learn on bikes up to 125cc. Otherwise you will need to apply to DVLA for provisional motorcycle entitlement to be added.