Hamerla, R. (2003). "Edward Williams Morley and the Atomic Weight of Oxygen; the Death of Prout's Hypothesis Revisited", Annals of Science 60(4): 351-372.Hamerla RR (2003) Edward williams morley and the atomic weight of oxygen: the death of prout’s hypothesis revisited. Ann Sci 60...
Uses:Oxygen was the atomic weight standard of comparison for the other elements until 1961 when the International Union of Pure and Applied Chemistry adopted carbon 12 as the new basis. It is the third mostabundant elementfound in the sun and the earth, and it plays a part in the carbon-n...
Atomic number 8; atomic weight 15.9994; melting point -218.79°C; boiling point -182.9°C; gas density at 0°C 1.429 grams per liter; valence 2. See Periodic Table. [French oxygène : Greek oxus, sharp, acid; see ak- in Indo-European roots + French -gène, -gen.] ox′y·gen′ic...
【题目】The atomic weight of oxygen is___than ___of the hydrogen. A. 15 times heavier; that B. 15 times heavier: those C. 16 times as heavier; that D. 16 times as heavy; those试题答案 在线课程 【答案】A 【解析】 试题分析:考查倍数表达法。句意:氧原子是氢原子重量的16倍。is 16...
Atomic Number (number of protons in the nucleus): 8 Atomic Symbol (on the Periodic Table of Elements): O Atomic Weight (average mass of the atom): 15.9994 Density: 0.001429 grams per cubic centimeter Phase at Room Temperature: Gas
Science Clarified As-Bi Atomic MassAtomic mass Photo by: TombakyThe atomic mass of an atom is the mass of that atom compared to some standard, such as the mass of a particular type of carbon atom. The terms atomic mass and atomic weight are often used interchangeably, although, strictly ...
Relative atomic mass15.999[1] Atomic mass15.999 amu[1] Molar mass15.99940 ± 0.00030 g/mol[5] Molecular weight31.998 g/mol[6] Mass number16[7] AllotropesO2, O3[1] Physical Properties ColorGas: colorless,Liquid: pale blue[1, 8] Meltingpoint/freezingpoint-218.79 °C, -361.82 °F[1] ...
Its atomic weight was used as a standard of comparison for each of the other elements until 1961 when the International Union of Pure and Applied Chemistry adopted carbon 12 as the new basis. Oxygen has thirteen recognized isotopes. Natural oxygen is a mixture of three isotopes. Oxygen 18 ...
Oxygen cylinders. Art restoration with oxygen – comparing cleaning and restoring a painting with acetone and methylene chloride (left) vs atomic oxygen (right). Oxygen is very efficient at removing carbon based dirt. Image: NASA. Discovery of Oxygen ...
Atomic number 8; atomic weight 15.9994; melting point -218.79°C; boiling point -182.9°C; gas density at 0°C 1.429 grams per liter; valence 2. See Periodic Table. [French oxygène : Greek oxus, sharp, acid; see ak- in Indo-European roots + French -gène, -gen.] ox′y·gen′ic...