Hydrogen

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Hydrogen is a gas at room temperature, found in Group 1. It has an atomic number of 1 and an atomic weight of 1.00794. Hydrogen is the most abundant element in the universe with a proton and electron number of one. One of the hydrogen's most exciting features is that it exists in the form of 3 isotopes, different in their atomic composition: protium, deuterium and tritium[1].

References:

  1. ↑ Thomas Jefferson National Accelerator Facility - Office of Science Education (2010)It's Elemental - The Element Hydrogen [Online]. Available from: http://education.jlab.org/itselemental/ele001.html [Accessed: 25 November 2010]
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