400000 pounds
57 million megaton
The largest atomic bomb ever built, the Tsar-bomb (Царь-бомба) weighed 27 tonnes, The Soviet Union and the USA both developed "Tactical Nukes" dubbed "Suitcase Nukes." The USA's smallest version weighed 51 pounds (MK-54 SADM). The Soviet version's weight is not released information.
The most powerful nuclear weapon detonated was the Tsar Bomb which was a 50 megaton thermo-nuclear bomb that was tested in October 30, 1961, in the Novaya Zemlya archipelago
The most powerful nuclear weapon ever detonated was the Russian "Tsar Bomba" in 1961. (50 Megatons) It had a yield of 100 megatons of TNT, but was reduced to avoid fallout. People 100 km away would have gotten third degree burns from the heat of the explosion.
Tsar Bomba (King of bombs) is the nickname for the AN602 hydrogen bomb, the most powerful nuclear weapon ever detonated on October 30, 1961 over the Mityushikha Bay nuclear testing range, Novaya Zemlya Island in the Arctic Sea. It yielded 50 Megatons, equivalent to 50 million tonnes of TNT, though was originally designed to be a 100 Megaton bomb. Despite it's power, it's use was impractical, since it could not easily be delivered to a far off target area. It was mainly built to display Russia's power during the cold war. A 50MTon bomb detonated at optimal airburst altitude has a blast radius of 60 miles. But I believe the Tzar Bomba was detonated low to minimize damage zone.
Russia
Tsar Alexander I of Russia.
Tsar Alexis I of Russia was born on March 9, 1629.
Tsar Alexis I of Russia was born on March 9, 1629.
Tsar Peter I of Russia was born on June 9, 1672.
Tsar Peter I of Russia was born on June 9, 1672.
Tsar Alexei I of Russia was born on August 12, 1629.
Tsar Alexei I of Russia was born on August 12, 1629.
Tsar Alexander I of Russia was born on December 23, 1777.
Tsar Alexander I of Russia was born on December 23, 1777.
Tsar Michael I of Russia was born on July 12, 1596.
Tsar Michael I of Russia was born on July 12, 1596.