Which nuclear reaction powers the energy generation in the core of the Sun and other main-sequence stars through the fusion of four hydrogen nuclei into a helium nucleus?

💡 Solution & Explanation

The proton-proton chain reaction is the predominant nuclear fusion sequence powering stars like the Sun, converting four protons into a helium-4 nucleus accompanied by positron emissions, neutrino releases, and massive energy output. Nuclear fission involves splitting heavy nuclei into smaller fragments, utilized in atomic power reactors. Alpha decay is radioactive disintegration emitting helium nuclei from unstable heavy nuclides. Neutron capture adds neutrons to atomic nuclei in stellar nucleosynthesis processes.