Albert Einstein did not split subatomic particles. While he was a revolutionary physicist, his work focused on areas like relativity, the photoelectric effect, and Brownian motion.

The splitting of subatomic particles is related to nuclear physics, which developed *after* Einstein's major contributions.

Here's a breakdown:

* Einstein's Contributions:

* His theories of relativity laid the foundation for understanding the relationship between energy and mass, expressed by the famous equation E=mc². This equation is essential for understanding nuclear reactions but doesn't directly split atoms.

* He also explained the photoelectric effect, which demonstrated the particle-like nature of light, contributing to our understanding of the quantum world.

* Nuclear Fission: The process of splitting atoms was discovered in the 1930s by physicists like Otto Hahn, Lise Meitner, and Fritz Strassmann. They found that bombarding uranium with neutrons could cause it to split into lighter elements, releasing enormous amounts of energy. This process is the basis for nuclear power and atomic bombs.

So, while Einstein's work was crucial to understanding the universe at the atomic level, he wasn't directly involved in the discovery of nuclear fission.