Nickel(III) compounds are black or gray.
n ɪ k ə l WORD_BOUNDARY ɹ oʊ m ə n WORD_BOUNDARY θ ɹ iː WORD_BOUNDARY k ɑ m p aʊ n d z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY b l æ k WORD_BOUNDARY ɔ ɹ WORD_BOUNDARY ɡ ɹ eɪ WORD_BOUNDARY