It Is Now Thought That Most Elements in the Universe

It is now thought that most elements in the universe heavier than iron in the periodic table:

A) are produced by the nuclear reactions in the central cores of high-mass stars a few hundred years before the star explodes into a supernova.
B) were produced in the Big Bang explosion at the beginning of our universe.
C) are produced by the successive capture of high-speed neutrons within low-mass star cores because neutrons are uncharged and can approach other nuclei without electrostatic repulsion.
D) are produced by nuclear reactions in the shock wave regions surrounding supernova explosions.

Correct Answer:

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