An event is the occurrence of something. If an event occurs over and over again following some sort of order the order is known as the pattern. The pattern is the overall structure that an event follows. Without a number of events there is not pattern. However, an event can occur without a pattern. The relationship among events is called a pattern
All carbon atoms can be connected to a continuous chain in the straight-chain alkane. In alkanes of a branched-chain, all carbon atoms cannot be connected to a continuous chain as a branch or side chain is part of the carbon chain.