The first ionization energy (in kJ\mol) of Na, Mg, Al and Si respectively, are:
The acidic , basic and amphoteric oxides, respectively, are:
Three elements X, Y, and Z are in the 3rd period of the periodic table. The oxides of X, Y and Z, respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of X, Y and Z is: