Question

elements belong to the same group have same valency. Give reason​

Answer 1

Answer:

Explanation:

(1) The valency of an element is determined by the number of valence electron in the outermost shell of an atom of an element. (2) All the elements in a group have the same number of valence electrons. Therefore, elements in the same group should have the same valency.

Elements in same group show same valency because they have same number of electrons in the outermost shell i.e. Valence shell. Since valency depends upon the valence electrons so they have same valency.

 

Within each column, or group, of the table, all the elements have the same number of valence electrons. This explains why all the elements in the same group have very similar chemical properties.

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Answer 2

Answer:

No

Explanation:

Elements belonging to the same group does not have same valency. According to the number of electrons valency, groups and periods are decided.

This is the answer.

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