Science
Junior High
イとウだけであってますか？
次の物質の組合せのうち, 互いに同素体であるものをすべて選べ。
(ウ)黒鉛とダイヤモンド
(カ)水と氷
(ア)塩素とヨウ素
(イ)酸素とオゾン
(エ) 一酸化炭素と二酸化炭素
(オ)鉛と亜鉛
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