There are three ways that scientists have proved that these sub-atomic particles exist.
Scientists made numerous conjectures and some theoretical predictions about what the nature of atomic structure really was.
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Just the facts Carbon: From stars to life As the sixth-most abundant element in the universe, carbon forms in the belly of stars in a reaction called the triple-alpha process, according to the Swinburne Center for Astrophysics and Supercomputing.
In older stars that have burned most of their hydrogen, leftover helium accumulates.
Iridium in powder form is a known irritant and is a fire hazard.