Russia
The United States is the only country to ever have used atomic bombs in warfare.
US
A country's total number of atomic bombs, or even hydrogen bombs in stock
Atomic bombs were not used anywhere in Europe in WW2. The only country that atomic bombs were dropped on in any war is Japan.
The United States dropped atomic bombs in Hiroshima and Nagasaki both being cities of Japan. There was no other country were atomic weapons had been used against mankind.
Pakistan is the first and still the only Muslim country to make atomic bombs.
Japan.
It wasn't an island, it is a country. The country was Japan.
In the space of three days in August 1945, the US dropped atomic bombs on two cities in Japan - Nagasaki and Hiroshima.
Only the US has ever used atomic bombs in a war, so there is no 2nd country to use them.
Atomic bombs were dropped on Hiroshima & Nagasaki in Japan at the end of WW2.