[填空题]
The oxides of two permgs2ia 3m6cx tj5i2h 3iod lau bq .7zd-z.3 elements, X and Y, react in water according to the equations bzd. q l7a.-bzuelow.
I. $XO_{2(s})$ + $H_2O_{l}$→$H_2XO_{3(aq)}$
II. $YO_{2(s})$ + $H_2O_{l}$→$Y(OH)_{2(aq)}$
1.Identify elements X and Y. Element X is ;Element Y is .
2.Predict whether element X or Y would have a higher melting point. Element will have a higher melting point than element