Q: Is oxygen a chemical element with symbol O and atomic number 8? ¶
A: Yes, It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.
Q: Was oxygen 8 times that of hydrogen? ¶
A: Yes, and instead of the modern value of about 16.
Q: Is oxygen the most abundant chemical element by mass in the Earth's biosphere? ¶
A: Yes, and air, sea and land.
Q: Is oxygen used in medical applications? ¶
A: Yes, and metal cutting and welding, as an oxidizer in rocket fuel, and in water treatment.
Q: Is oxygen associated with the atmospheric processes of aurora and airglow? ¶
Q: Is oxygen also stored and shipped in smaller cylinders containing the compressed gas? ¶
A: Yes, a form that is useful in certain portable medical applications and oxy-fuel welding and cutting.
Q: Was oxygen first discovered by Swedish pharmacist Carl Wilhelm Scheele? ¶
Q: Is oxygen the third-most abundant element in the universe? ¶
A: Yes, after hydrogen and helium.
Q: Was oxygen a constituent of all acids? ¶
Q: Is oxygen continuously replenished by photosynthesis? ¶
A: Yes, and which uses the energy of sunlight to produce oxygen from water and carbon dioxide.
Q: Is oxygen produced by the light-driven splitting of water during oxygenic photosynthesis? ¶
Q: Is oxygen so magnetic that? ¶
A: Yes, and in laboratory demonstrations, a bridge of liquid oxygen may be supported against its own weight between the poles of a powerful magnet.
Q: Was oxygen thought to be a requirement for all complex life? ¶
Q: Is oxygen commonly formed from water during photosynthesis? ¶
A: Yes, and using the energy of sunlight.
Q: Is oxygen the third most abundant chemical element in the universe? ¶
A: Yes, after hydrogen and helium.
Q: Is oxygen −2 in almost all known compounds of oxygen? ¶
Q: Is oxygen : glycerol? ¶
A: Yes, and formaldehyde, glutaraldehyde, citric acid, acetic anhydride, and acetamide.
Q: Is oxygen otopes in samples from the Earth? ¶
A: Yes, and the Moon, Mars, and meteorites, but were long unable to obtain reference values for the isotope ratios in the Sun, believed to be the same as those of the primordial solar nebula.
Q: Is oxygen responsible for red chemiluminescence in solution? ¶
Q: Is oxygen higher? ¶
A: Yes, while some estimates are lower, suggesting oceans produce ~45% of Earth's atmospheric oxygen each year.
Q: Is oxygen often transported in bulk as a liquid in specially insulated tankers, since one liter of liquefied oxygen is equivalent to 840 liters of gaseous oxygen at atmospheric pressure and 20 °C? ¶
A: Yes, Such tankers are used to refill bulk liquid oxygen storage containers, which stand outside hospitals and other institutions that need large volumes of pure oxygen gas.
Q: Was oxygen discovered independently by Carl Wilhelm Scheele? ¶
A: Yes, and in Uppsala, in 1773 or earlier, and Joseph Priestley in Wiltshire, in 1774, but Priestley is often given priority because his work was published first.
Q: Is oxygen too chemically reactive to remain a free element in air without being continuously replenished by the photosynthetic action of living organisms? ¶
Q: Was oxygen liquified in a stable state for the first time on March 29? ¶
A: Yes, and 1883 by Polish scientists from Jagiellonian University, Zygmunt Wróblewski and Karol Olszewski.
Q: Is oxygen the oxidant? ¶
A: Yes, and not the fuel, but nevertheless the source of most of the chemical energy released in combustion.
Q: Is oxygen replaced to maintain a constant partial pressure? ¶
Q: Is oxygen subjected to a pressure of above 96 GPa and it was shown in 1998 that at very low temperatures? ¶
A: Yes, and this phase becomes superconducting.
Q: Was oxygen coined in 1777 by Antoine Lavoisier? ¶
A: Yes, and whose experiments with oxygen helped to discredit the then-popular phlogiston theory of combustion and corrosion.
Q: Is oxygen used in cellular respiration and many major classes of organic molecules in living organisms contain oxygen? ¶
A: Yes, such as proteins, nucleic acids, carbohydrates, and fats, as do the major constituent inorganic compounds of animal shells, teeth, and bone.
Q: Is oxygen a highly reactive substance and must be segregated from combustible materials? ¶
Q: Is oxygen passed through heat exchangers? ¶
A: Yes, and which convert the cryogenic liquid into gas before it enters the building.
Q: Is oxygen used in mitochondria to generate ATP during oxidative phosphorylation? ¶
Q: Was oxygen independently developed in 1895 by German engineer Carl von Linde and British engineer William Hampson? ¶
Q: Is oxygen used by the chemical industry? ¶
Q: Is oxygen present to cause corrosion of spacecraft? ¶