1933, but it took until 1945 to build them.
1945
Nope.
He invented the first nuclear weapon, the atomic bomb.
The meaning of the word nuclear weapon, is a weapon that has a nuclear warhead on it.
This nuclear weapon is called an atomic bomb or a nuclear bomb
nuclear energy was first invented for a weapon of mass destruction (WOMD) but it was later developed as a main ingredient in the narcotic known as Molly (MDMA)
An atomic weapon is an alternative name for a nuclear weapon, a weapon which derives its energy from the nuclear reactions of either fusion or fission.
Nuclear weapon detonations
If by "bomb" you mean a conventional explosive weapon, then the nuclear weapon is more powerful.
Nuclear winters imply that a nuclear weapon was used. In 1817, none was even invented. The US used the first against Japan at the end of WWII in 1945.
* Earthquake Richter 5.0 = 32 kilotons nuclear weapon, like was used at Nagasaki * Earthquake Richter 6.0 = 1 megaton nuclear weapon * Earthquake Richter 7.0 = 32 megaton nuclear weapon * Earthquake Richter 7.1 = 50 megaton nuclear weapon, Tsar Bomba, the largest nuclear weapon ever tested * Earthquake Richter 8.0 = 1 gigaton nuclear weapon, much larger than anything ever made
A hydrogen bomb is, by far, the most destructive weapon that mankind has ever invented. It is the most powerful type of nuclear bomb.