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118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
Woburn (/ ˈ w uː b ər n / WOO-bərn) is a city in Middlesex County, Massachusetts, United States. The population was 40,876 at the 2020 census . Woburn is located 9 miles (14 km) north of Boston .
For some elements, this is because the material was known in ancient times, while for others, the name is a more recent invention. For example, Pb is the symbol for lead ( plumbum in Latin); Hg is the symbol for mercury ( hydrargyrum in Greek); and He is the symbol for helium (a Neo-Latin name) because helium was not known in ancient Roman times.
Benjamin Thompson's cradle, exhibited within the house. A Rumford fireplace, with its shallow angled sides, is visible in the background. The Benjamin Thompson House (also known as the Count Rumford Birthplace) is a historic house museum and National Historic Landmark at 90 Elm Street, in the North Woburn area of Woburn, Massachusetts.
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Woburn Public Library, previously known as the Winn Memorial Library (1876–79) is a National Historic Landmark in Woburn, Massachusetts. Designed by architect H. H. Richardson, the Romanesque Revival building was a bequest of the Winn family. [3] It houses the Woburn Public Library, an institution that was established in 1856. [4]
These elements originally referred to earth, water, air and fire rather than the chemical elements of modern science. The term 'elements' (stoicheia) was first used by Greek philosopher Plato around 360 BCE in his dialogue Timaeus, which includes a discussion of the composition of inorganic and organic bodies and is a speculative treatise on ...
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