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.
Average costs of construction in Australia. The BMT Construction Cost Table is a useful guide to the cost of construction for a variety of building types including, houses, townhouses, residential apartments, office blocks, industrial warehouses, supermarkets, shopping centres, hotels and motels.osts provided are an average price for typical buildings as at the date of publication, allowing for preliminaries, builders profit and overheads. Costs can provide no more than a rough guide to the probable cost of building, as costs vary significantly based on site conditions, level of fitout and design.