29、哎，又是一道化学送分题

    　　Solidelements,codedasG,JandQ,belongtothesameperiodoftheperiodictable,andformoxideswiththefollowingproperties:

    　　GO3reactswithwatertoformastronglyacidicsolution,

    　　J2O3reactswithstrongacidsandstrongalkalis,

    　　Q2Oreactswithwatertoformastronglyalkalinesolution.

    　　(a)Statewhichoxidewouldbedescribedasamphoteric.(1mark)

    　　(b)State,givingreasons,whichofG,JorQismostelectronegative.(2mark)