URL:https://1.bp.blogspot.com/-56B_I3oetkg/XbgNA1SbXAI/AAAAAAAAD68/gwX9RlIA9igyQITLRfnx4KksVGjgBrR_gCLcBGAsYHQ/s1600/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88+2019-10-29+18.56.22.png
掲載元:https://chemblogno1.blogspot.com/2019/10/sp-sp3-sp2-sp3.html