Assertion: plutonium | /r/HasProperty | silver-gray radioactive metal
Facets:
Source sentences:
text: Plutonium is a silver-gray radioactive metal that has six allotropic forms (see allotropy ).
text: Plutonium is a silver-gray radioactive metal that has six allotropic forms (see allotropy
text: Plutonium is a silver-gray radioactive metal that has six allotropic forms (see allotropy