The atoms that make up a molecule can be of the same element or different types. Diatomic molecules are a specific class of molecules that consist of two molecules of the same element. If the molecule is composed of atoms of at least two different elements, it is a chemical compound.
The cost of light rail construction varies widely, largely depending on the amount of tunneling and elevated structures required. A survey of North American light rail projects shows that costs of most LRT systems range from $15 million to over $100 million per mile.he cost of 17 miles (27 km) of highway improvements and 19 miles (31 km) of double-track light rail worked out to $19.3 million per highway lane-mile and $27.6 million per LRT track-mile. The project came in under budget and 22 months ahead of schedule.
Welcome to Building-Cost.net. In about 5 minutes you can develop a home construction or replacement cost that considers all the important variables: materials used, design features, quality, size, shape, heating, cooling and geographic area.Your printed estimate shows detailed labor and material costs for each of 34 construction cost categories.n about 5 minutes you can develop a home construction or replacement cost that considers all the important variables: materials used, design features, quality, size, shape, heating, cooling and geographic area. Your printed estimate shows detailed labor and material costs for each of 34 construction cost categories.