2. Central atom is that which is present in list in number.
t uː WORD_BOUNDARY s ɛ n t ɹ ə l WORD_BOUNDARY æ t ə m WORD_BOUNDARY ɪ z WORD_BOUNDARY ð æ t WORD_BOUNDARY w ɪ t̠ʃ WORD_BOUNDARY ɪ z WORD_BOUNDARY p ɹ ɛ z ə n t WORD_BOUNDARY ɪ n WORD_BOUNDARY l ɪ s t WORD_BOUNDARY ɪ n WORD_BOUNDARY n ʌ m b ə ɹ WORD_BOUNDARY