問題：It is the eighth element in Clarke number.<br /><br />Its ionic solution is used to make tofu.<br /><br />It is used in Grignard reaction (organic chemistry).<br /> 出題元【Elements】

出題元【Elements】

問題

It is the eighth element in Clarke number.<br /><br />Its ionic solution is used to make tofu.<br /><br />It is used in Grignard reaction (organic chemistry).<br />

Ｑ：It is the eighth element in Clarke number.<br /><br />Its ionic solution is used to make tofu.<br /><br />It is used in Grignard reaction (organic chemistry).<br />

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