Periodic Table of the Elements
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runt of the litter - 11/12/2006 6:44:50 PM

when oxygen and hydrogen combine does it make water?


need to know - 11/4/2006 11:54:29 PM

whene did the symbol for oxygen come from


E-mail address ur mom - 11/2/2006 1:39:06 AM

how many protons does oxygen have??


E-mail address hunnybunny - 11/1/2006 11:03:03 AM

so you know we are allowed to research on the internet :-D so I'm not technically cheating :-D


E-mail address hunnybunny - 11/1/2006 11:02:29 AM

Does anybody know how many diatomic gaseous elements are there? PLEASE reply! i'm in a science lesson and don't know the answer lol :-D


E-mail address lala land guy - 10/26/2006 7:06:25 PM

  E-mail address princess - 9/21/2006 5:28:51 AM
  i know you can not live without oxygen ,ijust need information on the element.

oxygen is made up of 8 electrons and 8 protons


The Smart One - 10/20/2006 4:12:29 AM

Atomic number

Atomic mass
15.999 g.mol -1

Electronegativity according to Pauling

1.429 kg/m3 at 20°C

Melting point
-219 °C

Boiling point
-183 °C

Vanderwaals radius
0.074 nm

Ionic radius
0.14 nm (-2)


Electronic shell
[ He ] 2s 2 2p 4

Energy of first ionisation
1314 kJ.mol -1

Energy of second ionisation
3388 kJ.mol -1

Energy of third ionisation
5300 kJ.mol -1

Discovered by
Joseph Priestly in 1774

Gaseous chemical element, symbol: O, atomic number: 8 and atomic weight 15,9994. It’s of great interest because it’s the essential element in the respiratory processes of most of the living cells and in combustion processes. It’s the most abundant element in The Earth’s crust. Nearly one fifth (in volume) of the air is oxygen. Non-combined gaseous oxygen normally exists in form of diatomic molecules, O2, but it also exists in triatomic form, O3, named ozone.

In normal conditions oxygen is a colourless, odourless and insipid gas; it condensates in a light blue liquid. Oxygen is part of a small group of gasses literally paramagnetic, and it’s the most paramagnetic of all. Liquid oxygen is also slightly paramagnetic.

Oxygen is reactive and will form oxides with all other elements except helium, neon, argon and krypton. It is moderately soluble in water (30 cm3 per 1 liter of water dissolve) at 20 Celsius.


Oxygen can be separated from air by fractionated liquefaction and distillation. The main applications of oxygen in order of importance are: 1) melting, refining and manufacture of steel and other metals; 2) manufacture of chemicals by controlled oxidation; 3) rocket propulsion; 4) medical and biological life support; 5) mining, production and manufacture of stone and glass products.
An emergency supply of oxygen automatically becomes available for the passenger in an aircraft when the pressure drop suddently. This oxygen is stored not as an oxygen gas but as the chemical sodium chlorate.

Oxygen in the environment

The crust of earth is composed mainly of silicon-oxygen minerals, and many other elements are there as their oxides.
Oxygen gas makes up a fifth of the atmosphere, amounting to more than a million billion tonnes. The oxygen in the Earth's atmosphere comes from the photosyntesis of plants, and has built up in a long time as they utilised the abundant supply of carbon dioxide in the early atmosphere and released oxygen.
Oxygen is fairly soluble in water, which makes life in rivers, lakes and oceans possible. The water in rivers and lakes needs to have a regular supply of oxygen, for when this gets depleted the water will no longer support fish and other aquatic species.

Nearly every chemical, apart from the inert gasses, bind with oxygen to form compounds. Water, H2O, and silica, SiO2, main component of the sand, are among the more abundant binary oxygen compounds. Among the compounds which contain more than two elements, the most abundant are the silicates, that form most of the rocks and soils. Other compounds which are abundant in nature are calcium carbonate (limestone and marble), calcium sulphate (gypsum), aluminum oxide (bauxite) and various iron oxides, that are used as source of the metal.

Health effects of oxygen

Oxygen is essential for all forms of life since it is a constituent of DNA and almost all other biologically important compounds. Is it even more drammatically essential, in that animals must have minute by minute supply of the gas in order to survive. Oxygen in the lungs is picked up by the iron atom at the center of hemoglobin in the blood and thereby transported to where it is needed.

Every human being needs oxygen to breathe, but as in so many cases too much is not good. If one is exposed to large amounts of oxygen for a long time, lung damage can occur. Breathing 50-100% oxygen at normal pressure over a prolonged period causes lung damage. Those people who work with frequent or potentially high exposures to pure oxygen, should take lung function tests before beginning employment and after that. Oxygen is usually stored under very low temperatures and therefore one should wear special clothes to prevent the freezing of body tissues.

Environmental effects of oxygen

Highly concentrated sources of oxygen promote rapid combustion and therefore are fire and explosion hazards in the presence of fuels.
The fire that killed the Apollo 1 crew on a test launchpad spread so rapidly because the pure oxygen atmosphere was at normal atmospheric pressure instead of the one third pressure that would be used during an actual launch.


andre - 10/17/2006 5:36:16 PM

how dd oxygen got it's name


E-mail address Smitty - 10/13/2006 3:02:49 PM

if anyone is on right now i could realy use your help my question is , What is its properties and whats the common materials found in it please and thanks =)


E-mail address Taylor - 10/11/2006 1:14:52 AM

  E-mail address princess - 9/21/2006 5:28:51 AM
  i know you can not live without oxygen ,ijust need information on the element.

oxygen has the atomic number of 8. The atomic mass is 16.00 it is in period 2 group or family 16


E-mail address Kenya - 10/1/2006 7:59:48 PM

what is oxygen's family name? and where wa sit discoevered and how was it discovered?


E-mail address princess - 9/21/2006 5:28:51 AM

  E-mail address princess - 9/21/2006 5:26:18 AM
  I need information on oxygen for a school project.

i know you can not live without oxygen ,ijust need information on the element.


E-mail address princess - 9/21/2006 5:26:18 AM

I need information on oxygen for a school project.


E-mail address Anna - 4/30/2006 12:23:46 PM

i have a project due and i have chosen oxygen in it we have to put how many protons, electrons and neutrons ! and i dont know please help! ! !


anonymous - 4/9/2006 5:09:03 PM

  E-mail address Anne - 3/22/2006 3:16:43 AM
  How many neutrons and protons are there in Oxygen??



E-mail address jessica - 4/8/2006 3:41:29 AM

Dose anybody know the answer to this question? "(how did oxygen get its name?)"


E-mail address Anne - 3/22/2006 3:16:43 AM

How many neutrons and protons are there in Oxygen??


E-mail address Sarah - 3/22/2006 2:34:50 AM

I have to do a report on oxygen and I need to know what the language of origin and original meaning of oxygen is. Thanks!


E-mail address swag - 3/15/2006 7:43:44 PM

what is oxygen's family and period and ionization energy. also what is some unusual facts about oxygen


E-mail address Get some Intelligence. - 3/11/2006 12:29:23 AM

  E-mail address Kerri Ford - 2/7/2006 5:04:36 AM

wrong dear.
it only has 6 valence electrons.
valence electrons are the outer most electrons. and oxygen has to energy levels. 2 on one level and 6 on the next level. which makes the 2nd level the outer most level. so there are 6 valence elcetrons.


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