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  3. Chemistry
  4. Three elements X, Y and Z are in the 3 text 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:

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Q. Three elements $X, Y$ and $Z$ are in the $3^{\text {rd }}$ 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:

JEE MainJEE Main 2020Classification of Elements and Periodicity in Properties

Solution:

When we are moving from left to right in a periodic table acidic character of oxides increases (as well as atomic number of atom increases)

$\therefore X < Y < Z \text { (acidic character) } $

$ X< Y< Z \text { (atomic number) } $