What is the heaviest element directly produced by nuclear fusion in the core of high-mass stars?Group of answer choicesHeliumIronSiliconNickelCarbonGold

What is the heaviest naturally occurring element?*

On the main sequence, stars obtain their energyGroup of answer choicesfrom nuclear fissionfrom gravitational contractionfrom chemical reactionsby converting helium to carbon, nitrogen and oxygenby converting hydrogen to helium

Every element with more protons than ______ is formed from a supernova explosion*1 pointHydrogenHeliumCarbonIron

Stellar nucleosynthesis makes stars shine and heavier elements form

What event is believed to create elements heavier than iron?a supernova explosionthe formation of a neutron star    the accretion of matter into a black holea nova outburst