This meme is a brilliant chemistry pun that plays on the dual meaning of "Bi" - both as bismuth (the chemical element) and as bisexual. The post lists actual properties of bismuth: atomic number 83, pentavalent bonding capabilities, cubic crystal structure, rainbow oxidation pattern, and its ridiculous half-life of 1.9×10¹⁹ years (way longer than our 13.8 billion year old universe). The commenter with username "bismuth_209" feels personally targeted by this scientific callout, while another user feels exposed by this eerily accurate "element-al" identification method. Chemistry nerds rejoice - your periodic table knowledge finally has dating application!
How To Tell If You're Bi(smuth)

chemistry-memes, bismuth-memes, periodic-table-memes, wordplay-memes, elements-memes | ScienceHumor.io