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.
In the historic articles about the construction of Vandalia Railroad Frankfort connection, it was estimated at $100,000 a mile for the elevated connection from ben davis, to frankfort. Today that cost would equate to $2,183,770.64 per mile.owest cost I've received so far is $125 per FOOT. That is for tangent track laid with new industrial grade crossties, new spikes, bolts, and anchors, used plates, used relay quality 100 lb rail, and includes ballast, lining, and tamping.