The question is unanswerable. Nucleosynthesis is the process of creating new elements; there isn't a single specific element that "creates" it.
Heavier elements are formed from hydrogen, the most abundant element in the universe, through a process called nuclear fusion. There are machines or structures in the universe that do this, and we call them stars. It is the process within stars, stellar nucleosynthesis, that allows heavier elements to be created up through iron. Elements heavier than iron are formed in supernova events. Use the links below to learn more.
transmutation
The process in which a new lighter element is created by the release of an alpha ray particle from an atomic nucleus is called alpha decay of the original nucleus.
When water vapor in the air becomes liquid, it's called condensation. Many people see condensation when carrying a cold glass outside on a hot day. The condensation process creates clouds in the atmosphere.
New substances are created using the combination of two other substances. The process by which this happens is called a reaction.
In the hearts of stars. The process is called stellar nucleosynthesis.
This process is called stellar nucleosynthesis.
The process is called stellar nucleosynthesis.
Nuclear fusion. In the case of stars, it is often called nucleosynthesis.
This process is called stellar nucleosynthesis.
A process called weathering
photosynthesis
The process is called stellar nucleosynthesis and is based on nuclear fusion reactions.
fabrication, also called fab.
Neutrons combined with protons to form the Universe's deuterium and helium nuclei in a process called the Big Bang nucleosynthesis
The process of nuclear division which creates two new identical nuclei is called mitosis.
The Kreb's cycle also called the Citric acid cycle - a process that creates ATP.