Three elements X , Y and Z are in the 3 rd 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 an

Question

Three elements X , Y and Z are in the 3 rd 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:

TestHub · Accepted Answer

On moving left to right in a period. Acidic character of oxides is increase. $3^{rd}$ period element oxides. $\underset{Basic}{\underset{⏟}{{Na}_{2} O}} MgO \underset{Amphoteric}{\underset{⏟}{{Al}_{2} O_{3}}} \underset{Acidic}{\underset{⏟}{{SiO}_{2} P_{2} O_{5} {Cl}_{2} O 7}}$
(i) Acidic character $↑$
(i) Atomic No $↑$ so $X$ have minimum Atomic No
& $Z$ have maxima Atomic No So correct order is $X < Y < Z$

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