Question 1

True or false: All elements heavier than iron require more energy to fuse than they release.

Accepted Answer

True. Iron-56 has the highest binding energy per nucleon; fusion beyond it consumes energy, so it only occurs in supernovae or neutron star mergers.

Question 2

True or false: The triple-alpha process in red giants creates carbon from three helium nuclei.

Accepted Answer

True. In red giants, three helium-4 nuclei fuse into carbon-12 via the triple-alpha process, a rare but crucial step for life.

Question 3

True or false: Lithium is easily destroyed in stars, so most cosmic lithium comes from the Big Bang.

Accepted Answer

False. Big Bang nucleosynthesis produced only trace lithium-7. Most lithium in the universe comes from cosmic ray spallation and AGB stars.

Question 4

True or false: The Sun currently fuses hydrogen into helium in its core via the CNO cycle.

Accepted Answer

False. The Sun primarily uses the proton-proton chain. The CNO cycle dominates only in stars more massive than about 1.3 solar masses.

Question 5

True or false: Most of the gold in your jewelry was forged in a neutron star collision.

Accepted Answer

True. Gold and other heavy elements are primarily produced via rapid neutron capture in neutron star mergers, not supernovae as once thought.

Question 6

True or false: Supernovae produce elements up to nickel-56, which then decays into iron-56.

Accepted Answer

False. Nickel-56 is indeed produced in supernovae and decays to iron-56, but supernovae also forge heavier elements via the r-process.

Question 7

True or false: The cosmic abundance of beryllium comes mainly from stellar fusion in massive stars.

Accepted Answer

False. Beryllium-9 is actually produced by cosmic ray spallation, not stellar fusion. Stars mostly destroy beryllium via fusion.

Question 8

True or false: The element technetium was first discovered in the spectrum of a red giant star.

Accepted Answer

True. Technetium, an unstable element with no stable isotopes, was found in the atmosphere of red giant stars, proving ongoing nucleosynthesis.

Stellar Nucleosynthesis Trivia Questions