Meaning: Use up, consume fully. Classified under: Verbs of eating and drinking. Synonyms: expend; use. Context example: The legislature expended its time on school questions Expend entails doing...: consume; deplete; eat; eat up; exhaust; run through; use up; wipe out (use up (resources or materials)) Troponyms (each of the following is one way to expend):
Supernova nucleosynthesis. Supernova nucleosynthesis is a theory of the production of many different chemical elements in supernova explosions, first advanced by Fred Hoyle in 1954. The nucleosynthesis, or fusion of lighter elements into heavier ones, occurs during explosive oxygen burning and silicon burning processes. Those fusion reactions create the elements silicon, sulfur, chlorine, argon, sodium, potassium, calcium, scandium, titanium and iron peak elements: vanadium, chromium, manganese, iron, cobalt, and nickel.
I guess statistically speaking the heavier elements are much rarer than oxygen, carbon, nitrogen, etc, but does this mean that maybe life is truly really rare (except in our neck of the Milky Way)? That's right. Supernova nucleosynthesis isn't as efficient as the long years of synthesis in stellar cores. Have elements heavier than Iron ever been detected outside our Solar System (Like in the emission lines of a nebula, for example - or does the physics model predect them?) Absolutely. They're everywhere. This page was last updated June 27, 2015. 1  Elements. 2  Supernovae. 3  Formation. 4  Iron. 5  Nuclear Fusion. 6  Nucleosynthesis.