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.
When a red giant star has changed all of its helium into carbon and oxygen, it then begins to turn the carbon and oxygen atoms into iron Atoms. Iron is the heaviest kind of atom that a star can make, so when a star has made most of its carbon and oxygen into iron, it becomes a supernova and explodes.hen the supernova explodes, it shoots out carbon, oxygen, and iron atoms all over the Universe, and eventually gravity sucks these atoms into new planets like Earth. All of the iron on Earth was originally inside stars.