CBSE Class 9 Answered
what will be the valency of an element having atomic number (z)=7 ? Can you pls suggest step wise methods to solve this problem.
Asked by Amrut Kurtkoti | 02 Mar, 2015, 06:55: PM
Expert Answer
Hi Amrut,
The combining capacity of the element is called valency.
If the atomic number of the given element is 7 then,
The electronic configuration will be (2, 5). That is, it will have 2 electrons in its K shell and 5 electrons in the L shell
Thus, it will require 3 more electrons to complete its octet.Thus according to the definition, the valency of an element will be 3.
Hope this clears your doubt!
Answered by | 02 Mar, 2015, 07:04: PM
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