[DOC] [TLE] Helium (He) - Dominion Gas [PAR] Helium (He) is the second lightest element (hydrogen being the lightest) with a 
gaseous specific gravity of ... Also, its low specific gravity and non-flammability 
allow its use in lighter-than-air applications such as the filling of balloons and 
blimps. Mixtures of helium and oxygen are used as a breathing gas for deep-sea 
diving. [DOC] [TLE] Hydrox (breathing gas) - Wikipedia [PAR] Hydrox, a gas mixture of hydrogen and oxygen, was used as a breathing gas in 
very deep diving. ... Hydrogen is the lightest gas (half the weight of helium) but 
still has a narcotic potential and may cause ... Texas A&M University Sea Grant. [DOC] [TLE] Breathing gas - Wikipedia [PAR] A breathing gas is a mixture of gaseous chemical elements and compounds used 
for .... Hydreliox is a mixture of oxygen, helium, and hydrogen and is used for 
dives below ... Hydrox, a gas mixture of hydrogen and oxygen, is used as a 
breathing gas in very deep diving. ..... United States: US Naval Sea Systems 
Command. [DOC] [TLE] What is Helium!!! - YouSigma [PAR] It is second lightest gas next to hydrogen but it has a specialty that, unlike ... On 
account of its lightness and non-inflammability, it is used in weather balloons. ... 
Deep sea divers are given a mixture of oxygen and helium for breathing so that... [DOC] [TLE] APPLICATIONS | Helium Scarcity [PAR] Helium is the second lightest element after hydrogen and the density of helium is 
... Therefore helium is used as lift gas for balloons, meteorological balloons, ... 
trimix and heliox are used instead of nitrogen /oxygen breathing mixtures to avoid 
... Hydrogen is investigated as a substitute for helium as deep sea diving gas. [DOC] [TLE] helium - The Worlds of David Darling [PAR] The main source of helium is natural gas. It is used to inflate and provide lift for 
balloons and airships; in breathing mixtures for deep-sea divers; as a pressurizer
... [DOC] [TLE] Helium - NMR Facility [PAR] As one of the inert, noble gases, helium (He) has unique physical properties that 
... Helium is the second most abundant element in the universe after hydrogen, at 
~23%. ... far beyond being light-weight, safe filling for party balloons and blimps. 
.... Used in breathing mixtures for deep-sea diving or under high atmospheric... [DOC] [TLE] Why Is Helium Important? - A Knowledge Archive [PAR] Jan 13, 2016 ... Being the second lightest gas in the universe means even the ... Therefore, 
helium is used as lift gas for balloons, meteorological balloons, and airships. ... 
Helium is used as a deep sea diving gas at water depths below 30 m ... Helium 
with oxygen breathing mixtures such as Heliair and Trimix are used to... [DOC] [TLE] Helium Facts - The Balloon Shop [PAR] Here are a few facts about helium gas which you may find interesting: ... as a 
replacement for the explosive hydrogen used in observation balloons and 
airships. ... Helium is the second lightest chemical element, with many unique 
properties. ... It is also a vital part of air mixtures for breathing by deep-sea divers
unlike... [DOC] [TLE] Helium in Kansas - Center for Great Plains Studies | Emporia State ... [PAR] Helium has been used in nuclear reactors and ballistic missiles and is also used 
for magnetic resonance ... Why do helium filled balloons fall to the floor the next 
day? ... Helium, or He, is the second lightest elemental gas next to hydrogen. ... 
Deep-sea divers avoid the bends by breathing a mixture of helium and oxygen. [DOC] [TLE] Helium - RationalWiki [PAR] Jan 11, 2014 ... Helium is the second lightest element, heavier only than hydrogen, and has an ... 
hydrogen, helium is the preferred element whenever a light gas is needed. ... 
Deep-sea divers breathing pressurized air have problems with bubbles of ... 
scuba diving, two mixtures involving helium are used at greater depths:. [DOC] [TLE] Extraction of Helium from Terrstrial Gases | Department of Atomic ... [PAR] The second

Question: This 2nd lightest gas is used in balloons & in a breathing mixture for deep-sea divers
Answer: Helium