-PROTACTINIUM-#91
. (atomic #91) (meaning โparent of actiniumโ) (because ‘actinium’ is a product of the radioactive decay of ‘protactinium’) . . *๐จโ๐ฌ๐ต๏ธโโ๏ธ๐โโ๏ธ*SKETCHES*๐โโ๏ธ๐ฉโ๐ฌ๐ต๏ธโโ๏ธ* . ๐๐|/\-*WIKI-LINK*-/\|๐๐ . . […]