tàn 'carbon'. For example, 1-hexadecene is 1-十六碳烯 (read as [1, yī] [-, wèi] [十六, shíliù, '16'] [碳, tàn] [烯, xī]), where the hyphen is read as 位 (wèi, 'position')...

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U+70Dx 烐 烑 烒 烓 烔 烕 烖 烗 烘 烙 烚 烛 烜 烝 烞 烟 U+70Ex 烠 烡 烢 烣 烤 烥 烦 烧 烨 烩 烪 烫 烬 热 烮 烯 U+70Fx 烰 烱 烲 烳 烴 烵 烶 烷 烸 烹 烺 烻 烼 烽 烾 烿 U+710x 焀 焁 焂 焃 焄 焅 焆 焇 焈 焉 焊 焋 焌 焍...