Assertion: protactinium | /r/AtLocation | the actinide group
Facets:
Source sentences:
text: Protactinium is a silver metallic element that is in the actinide group, with a bright metallic shine that it keeps for some time in the air.
text: Protactinium is a silver metallic element that is in the actinide group, with a bright metallic shine that it keeps for some time in the air.
text: Protactinium is a silver metallic element that is in the actinide group, with a bright metallic shine that it keeps for some time in the air.
text: Protactinium is a silver metallic element that is in the actinide group, with a bright metallic shine that it keeps for some time in the air.