this gas is obtained from coal
41Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …
42Nottingham Corporation Tramways — This article is about trams between 1898–1938. For trams between 1875 1897, see Nottingham and District Tramways Company Limited. For trams from 2004 onwards, see Nottingham Express Transit. Tram passing Nottingham Victoria Railway Station… …
43List of fictional elements, materials, isotopes and atomic particles — This list contains chemical elements, materials, isotopes or (sub)atomic particle that exist primarily in works of fiction (usually fantasy or science fiction). No actual periodic elements end in ite , though many minerals have names with this… …
44List of chemical element name etymologies — This is the list of etymologies for all chemical element names: Name Symbol Language of origin Word of origin Meaning Symbol origin Description Actinium Ac Greek ἀκτίς (aktis) beam Greek aktinos ἀκτίς, ἀκτῖνος (aktis; aktinos), meaning beam (ray) …
45Nuclear magnetic resonance — This article is about the physical phenomenon. For its use as a method in spectroscopy, see Nuclear magnetic resonance spectroscopy. NMR redirects here. For other uses, see NMR (disambiguation). First 1 GHz NMR Spectrometer (1000 MHz,… …
46Potential energy — This article is about a form of energy in physics. For the statistical method, see Potential energy statistics. Classical mechanics Newton s Second Law …
47Charles de Gaulle — This article is about the French statesman. For other uses, see Charles de Gaulle (disambiguation). Charles De Gaulle President of the French Republic Co Prince of Andorra In office 8 January 195 …
48Germany — This article is about the country. For other uses of terms redirecting here, see Germany (disambiguation) and Deutschland (disambiguation) …
49Denmark — This article is about the country. For other uses, see Denmark (disambiguation). Denmark Danmark …
50List of Doctor Who monsters and aliens — This is a list of monsters and aliens from the long running BBC science fiction television series Doctor Who . The list includes some races which are not extraterrestrial, but are nonetheless non human. This list is meant to cover alien races and …
