What was the name of the bomb that was dropped on Hiroshima?

The bomb dropped on Hiroshima was named "Little Boy." It was an atomic bomb that used uranium-235 as its fissile material and was significant for being the first nuclear weapon used in warfare. The name "Little Boy" was chosen in part to invoke the image of a small but powerful weapon, and it was dropped on August 6, 1945, leading to the immediate end of World War II in the Pacific.

The term "Fat Boy" does not refer to any historically significant bomb; it seems to be a mix-up with the name of the atom bomb dropped on Nagasaki, known as "Fat Man." "Big Boy" is not associated with any nuclear weapon and "Atom Bomb" is a generic term that refers to all atomic bombs but does not identify the specific weapon used on Hiroshima. Understanding the historical context of these names is crucial for recognizing their significance in military history.