Element Project

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Element Project

2HeHeluim4.00 amu

Element Project

Electron Configuration1s2

Helium is a noble gas. It is in the 1st period and in the last group.

2 protons, neutrons, and electrons2 valence electrons

When: 1868Who: Pierre-Jules-César JanssenHow: During the solar eclipse of 1868 in India he detected a new yellow line in the solar spectrum.Where it can be found: The sun, balloons, compressed air tanks, lasers, rocket fuel, blimps and nuclear reactor coolers

-Nonmetal- Boiling point: -268.93 C-Melting point: -272.2 C- (under the pressure of 25 atmospheres)Color: ordinarily colorless, but glows pale peach when an electric current runs through it

Physical Description

Sources:-periodictable.com-webelements.com-chemicool.com-periodic.lanl.gov-http://www.webelements.com/helium/history.html-http://www.chem4kids.com/files/elements/002_speak.html-http://www.google.com/imgres?imgurl=http%3A%2F%2Fmedia.treehugger.com%2Fassets%2Fimages%2F2011%2F10%2Fhelium.jpg'imgrefurl=http%3A%2F%2Fwww.treehugger.com%2Fgreen-architecture%2Fpeak-helium-get-ready-for-the-100-party-balloon.html'h=346'w=468'tbnid=Z_ThctLhC81eqM%3A'zoom=1'docid=j9oYNkEJxiQRwM'hl=en'ei=yZBAVLXPJ6i1sQTVxYH4CA'tbm=isch'ved=0CDQQMygBMAE'iact=rc'uact=3'dur=5783'page=1'start=0'ndsp=36-http://www.google.com/imgres?imgurl=http%3A%2F%2Fgallica.bnf.fr%2Fark%3A%2F12148%2Fbtv1b84529628%2Ff1.highres'imgrefurl=http%3A%2F%2Fgallica.bnf.fr%2Fark%3A%2F12148%2Fbtv1b84529628%2Ff1.item'h=798'w=510'tbnid=xuy5RdtBJYuAYM%3A'zoom=1'docid=d8xzqc_iGB3SmM'hl=en'ei=VpJAVKWzPI7gsATHpILoCQ'tbm=isch'ved=0CCQQMygFMAU'iact=rc'uact=3'dur=840'page=1'start=0'ndsp=50-http://www.youtube.com/watch?v=kanCmXve3aw

-Used in magnetic resonance imaging (MRI) to cool MRI scanners' superconducting magnets-Used for filling balloons and pressuring liquid fuel rocketsMixtures of helium and oxygen are used as an artificial "air" for divers-Used as a gas shield in the vicinity of arc welding-Used as a cooling medium for nuclear reactors-Used a gas for supersonic wind tunnels

Uses


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