There are a few:
Plutonium or Uranium (either, or both, depending on the weapon)
Beryllium
Gold
Steel
Aluminum
Boron
Lead
Copper
Older style or more primitive weapons may contain polonium in the initiator.
Uranium or plutonium
UraniumIronLeadCadmiumetc.
Plutonium
The radioactive elements plutonium or uranium are the elements that are used in nuclear weapons that create nuclear fission. Isotopes of hydrogen are used in nuclear weapons that create nuclear fusion.
Mercury
Uranium or plutonium
UraniumIronLeadCadmiumetc.
Plutonium
The radioactive elements plutonium or uranium are the elements that are used in nuclear weapons that create nuclear fission. Isotopes of hydrogen are used in nuclear weapons that create nuclear fusion.
Mercury
The fuel is uranium, but in an oxide form, UO2 so not metallic. The fuel is in zirconium tubes. Otherwise there is plenty of steel including stainless steel in the structures and the pressure parts of the reactor.
uranium
Plutonium or Uranium .
nobelium is a radioactive element produced artificially from curium. Curium is a silvery white metallic radioactive element artificially produced from plutonium. Plutonium is a toxic radioactive metallic element used in nuclear reactors and weapons.
Uranium - 235
Element 115 made power for nuclear reactors.Element 115 also made new weapons for the U.S.
Francium is the most metallic element. :)