Which is your favourite chemical element? To mark the International Year of the Periodic Table, our science journalists will be arguing for their pick from the 118 known elements. In this instalment, ...
Immediately after the Big Bang, before the first stars in the Universe ever formed, the Universe consisted of hydrogen (element #1), helium (element #2) and pretty much nothing else. Despite ...
First discovered in the corona surrounding the sun and later found in gases leaking from Mount Vesuvius, helium is the second-most abundant element in the universe. The second element on the Periodic ...
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