Small measurements like the mass of an atom use special units of measurement.
s m ɔ l WORD_BOUNDARY m ɛ ʒ ə ɹ m ə n t s WORD_BOUNDARY l aɪ k WORD_BOUNDARY ð ə WORD_BOUNDARY m æ s WORD_BOUNDARY ə v ə n WORD_BOUNDARY æ t ə m WORD_BOUNDARY j uː s WORD_BOUNDARY s p ɛ ʃ ə l WORD_BOUNDARY j uː n ɪ t s WORD_BOUNDARY ʌ v WORD_BOUNDARY m ɛ ʒ ə ɹ m ə n t WORD_BOUNDARY