Promethium is a chemical element with the symbol Pm and atomic number 61. It is notable for being the only exclusively radioactive element besides technetium that is followed by chemical elements with stable isotopes.
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Nureongi (누렁이) and Hwangu (황구; 黃狗) are Korean terms meaning "Yellow Dog" used to refer to tannish mongrel or landrace of dog in... -
Three portions of the post-creole continuum : acrolect ( linguistics ) The variety of speech that is considered the standard form. m...
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