Nuclear bombs have neptunium in them.
Environment used the neptunium for a bunch of different objects.
Professors discovered,it at a California collage.
They named it after the planet Neptune.
Uranium wasn't the first element in the actinide group neptunium was.
It's in most of the worlds nuclear weapons.
Uranium and neptunium are pretty much the same thing.
Most of the fire alarms have this in them.