Assertion: plutonium's electron | /r/CapableOf | produce new element
Facets:
value: with an atomic number of 93
type: OTHER
value: with a mass of 239
type: OTHER
Source sentences:
text: This is because uranium-238 absorbs slow neutrons and forms a new isotope, U-239, whose nucleus rapidly emits an electrons producing a new element with a mass of 239 and an atomic number of 93.