Which element with the atomic number 94 was used in the core of the bomb detonated at Nagasaki in 1945?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Plutonium
The element with atomic number 94 is plutonium (Pu). The bomb dropped on Nagasaki on 9 August 1945, called “Fat Man”, had a core of plutonium-239; the Hiroshima bomb three days earlier, “Little Boy”, used uranium-235.