Well the most reasons were that the atomic bomb did not only kill so many in the explosion but many more when the mushroom cloud started cancer all across china. That still effects china today with probloms about cancer
a nuclear explosion
You would see a flash from an atmospheric atomic explosion from orbit, maybe even from the Moon without a telescope.
It is comparable to it.
BIG
yes Because they made a nuclear device inside it and if it touched waer i evaporates and blows up bigger than its explosion.
It was in 1949 that the Soviet Union exploded an atomic bomb, and the communists gained control of China. Both of these events were worrisome to the U.S.
It will cause an atomic explosion.
TNT(Trinitrotolune)
Today the blast from the atomic bomb no longer affect people. As an example we have the reef which died at the experiment blast in Binini Island. They started to grow back after 50 years.
"The first atomic explosion occurred on 16 July 1945 at the Alamogordo Test Range in New Mexico, during a test called Trinity."
changes in genes
Tsar Bomba by the Soviets