oxygen

Oxygen is the element with atomic number 8 an represented by the symbol O. It is a member of the chalcogen group on the periodic table, and is a highly reactive nonmetallic period 2 element that readily forms compounds (notably oxides) with almost all other elements. At standard temperature and pressure two atoms of the element bind to form dioxygen, a colorless, odorless, tasteless diatomic gas with the formula O2. Oxygen is the third most abundant element in the universe by mass after hydrogen and helium and the most abundant element by mass in the Earth's crust. Oxygen constitutes 88.8% of the mass of water and 20.9% of the volume of air.

Trivia about oxygen

By weight, this element makes up more of the human body than all the others combined
People who live at high altitudes often have thicker blood, to deliver more of this gas to body cells
Nitrogen makes up about 78% of the air to this gas' 21%, so no one has ever needed a nitrogen tent
In the lungs, this element joins with the iron in hemoglobin
This element makes up most of the weight of water & about half the weight of rocks
Only a few living things, like some germs, can live without this gas symbolized O
The main purpose of a red blood cell is to carry this gas from your lungs to the rest of your body
One reason for plowing is to aerate the soil, especially with this, making up about 1/5 of the air
Though the brain is only 2% of human body weight, it uses up to 25% of this in the blood
The triatomic molecule O3 is called ozone; the diatomic O2 is simply this
by definition an anaerobe is an organism that lives in an environment free of this element
It's the element shared by water & carbon dioxide
Discovered separately in the 1770s by British & Swedish chemists, it was found to be a gas by a Frenchman
Nitrogen makes up around 78% of the atmosphere; this gas, only about 20%
In the hyperbaric type of this "therapy", the patient inhales the pure gas in a large chamber
This element provides about 89% of the weight of a water molecule
The largest part of a water molecule is an atom of this element that has a negative charge
LOX, the one used in rockets, not in bagels, is liquid this
'Colonization of Mars may take some doin
Reinhold Messner amazed people when he reached the summit without a bottle of this, a need for most
This gas is produced by plants during photosynthesis
It makes up about 21% of the air we breathe
John Dalton figured that in water, an atom of this was 8 times heavier than an atom of hydrogen
Air consists of about 78% nitrogen, 1% argon & 21% this gas
One of the main jobs of red blood cells is to carry this gas from the lungs to the body's tissues
New on the magazine stand in 1997 was this women's fitness magazine that might be abbreviated O2
(Jon of the Clue Crew performs CPR on a mannequin.) The purpose of CPR's chest compressions is to keep the blood carrying this to the brain
By mass it's the most abundant element in Earth's hydrosphere
By weight you're 65% this element
(Jimmy reporting from the EPA P3 Expo in Washington DC) To help tsunami-ravaged Indonesia replace its food supply, students of Duke have made a mechanical aerator, that increases shrimp hatchery yields by adding this element
(Jimmy of the Clue Crew reports from a bedside.) Here at the sleep center at Stanford Hospital and Clinics, one of the 32 devices attached to a subject measures the levels of this element in the blood, which can be an indicator of sleep apnea
The field of cryogenics had its inception in 1877, the year this element was first cooled into a liquid at -183 C.
A tank with a large surface increases the supply of D.O., dissolved this, which fish take from the water
On the periodic table: carbon, nitrogen, this
This element, atomic No. 8, is responsible for the respiration of living things & the combustion of fuels
A fire-eater makes sure the flame is out before opening his mouth--otherwise a rush of this will revive it
Mogul Oprah co-founded this media company, a breath of fresh air with its women's cable network
Take a deep breath & tell us the name of this most abundant element in the earth's crust
(Sarah of the Clue Crew indicates a monitor.) Two atoms of this element create a stable bond; when three of them bond, they form the unstable ozone molecule
(Jon of the Clue Crew puts a lid on it--literally.) The candle in the small jar will burn out first because it has the least amount of this to burn
On average rocks consist of 46.5% this gaseous element
In the early 1770s Carl Scheele discovered this gas, but Joseph Priestley published his paper first & got the credit
A component of acids, this gas discovered in 1774 gets its name from the Greek words for "acid" & "forming"
From the Greek for "acid former", this gas is the most abundant element in the earth's crust
You've won the race to discover this element--now decide whether to call it "fire air" or "dephlogisticated air"
The atmosphere around the Dead Sea should make you feel good; it has more of this than anywhere else on Earth
This gas is released during photosynthesis
This element accounts for about 47% of the Earth's crust
In the 18th century Antoine Lavoisier gave this element its name, from the Greek for "acid forming"

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