Helium

jacky8w

,Hong Kong

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Helium

Helium is colorless, odorless, tasteless and non-toxic gas. Helium is the second most lightest and second most abundant element is the universe. Helium is pretty rare and is created by a natural radioactive decay of some elements.

How is Helium made? Helium is made in nature when two Hydrogen atoms, combine at the atomic level. This combination can take place when Hydrogen particles collide at great speed or under extreme pressure. Helium is the second most abundant substance in the observable universe. Hydrogen is the most abundant.

Sources used

http://en.wikipedia.org/wiki/Helium

http://wiki.answers.com/Q/How_is_helium_made_when_it_is_a_form_of_gas

Helium, the lighter of the noble gases, was the first to be discovered. This gas was first to be identified in the Sun rather than the Earth. In 1868, during a solar eclipse in India, a spectrometer was used for the first time in the study of the chromosphere around the Sun.The chromosphere's spectrum, among other bright stripes, contain the hydrogen characteristic stripes and a yellow one that, at the time, was thought to be corresponding to sodium. The French astronomer Janssen decided to study the origin of that stripe and tried to reproduce the chromosphere's spectrum starting from ordinary light. He succeeded his purpose proving that the yellow stripe did not belong to sodium, but was probably the stripe of a new element.