Question 3 - Past Year - 3 Mark Questions - Chapter 5 Class 10 - Periodic Classification of Elements

Last updated at July 13, 2026 by

Two elements X and Y have atomic numbers 12 and 16 respectively. To which period of the modern periodic table do these two elements belong? What type of bond will be formed between them and why? Also give the chemical formula of the compound formed.

 

Answer

Atomic number of X = 12

Electronic configuration = 2, 8, 2

Atomic number of Y = 16

Electronic configuration = 2, 8, 6

Since both X and Y have 3 shells, they both belong to the third period.

In order to attain noble gas configuration, X will lose 2 electrons whereas Y will gain 2 electrons . Therefore, X and Y will form an ionic bond which each other i.e. Y will accept the two electrons donated by X.

Ionic bond between X and Y - Teachoo.jpg

The chemical formula of the compound formed is XY

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Transcript

Ionic bond between X and Y

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