(20 1 1? Liangshan Prefecture) 20 1 1 March11day, a strong earthquake with a magnitude of 9 on the Richter scale occurred in Japan, which led to the nuclear leakage at the Fukushima nuclear power plan

(20 1 1? Liangshan Prefecture) 20 1 1 March11day, a strong earthquake with a magnitude of 9 on the Richter scale occurred in Japan, which led to the nuclear leakage at the Fukushima nuclear power plant, causing national concern in some countries. Iodine (1) is the main element in the synthesis of thyroid hormone. If it is lacking, it will cause goiter. Eating iodized salt can prevent goiter.

(2) The mass ratio of potassium, iodine and oxygen in potassium iodate (KIO3) is 39:127: (16× 3) = 39:127: 48.

(3) According to the label information, if the iodine content is (20-30)mg/kg, the quality of iodine supplement for adults who eat 5g of this "iodized salt" every day is 5g× 20mg1000g×100% = 0.1mg.

So the answer is: (1) goiter; (2)39: 127:48; (3)0. 1.