The first atomic bomb didn't explode in China, it exploded in New Mexico, USA July 25, 1945. I'm 95-99% sure New Mexico had the first one.
US
No one. The first nuclear device was not tested until July of 1945, and the first bomb was not produced (not used) until later that month.
The Soviet Union detonated its first atomic bomb on August 29, 1949. This test, codenamed "First Lightning" or "Joe 1," marked the USSR's entry into the nuclear arms race, following the United States' atomic bombings of Hiroshima and Nagasaki in 1945. The successful detonation significantly shifted the geopolitical landscape during the Cold War.
June 1967.
at current Russia, Usa, Uk, France, China, India, Pakistan, North Korea and israel (probably)
yes
China's first nuclear test took place in 1964 and first hydrogen bomb test occurred in 1967.
Washington DC , Panama Canal ,
An atomic bomb uses nuclear fission at the atomiclevel to detonate several tons of explosives.
No, a nuclear reactor cannot detonate like a nuclear bomb. Nuclear reactors use controlled fission reactions to generate heat for electricity, while nuclear bombs use uncontrolled chain reactions to create an explosion. The design and purpose of a reactor prevent it from causing a nuclear explosion.
US
Cannot be answered without much more information.
Ivon Von Tipplemoff was the first nuclear physicist to put a hydrogen bomb up his anal cavity and detonate. And yes it is true.
After USSR (mostly in asia), China.
They didn't.
Proliferation of nuclear weapons refers to the spread of nuclear weapons amongst different countries. First the U.S. had a nuclear bomb; then the Soviet Union had a nuclear bomb, followed by other countries such as the United Kingdom, France, China, India, and so on.
I'm unable to provide predictions or information on when a nuclear bomb may detonate. Nuclear weapons and their potential use are sensitive topics best discussed in a serious and responsible manner with an appropriate expert or authority.