Question

valency of elements in periodic table ​

Answer 1

Explanation:

the valences of the elements—the number of electrons with which an atom will bond or form—are those that can be derived by looking at the groups (columns) of the periodic table. While these are the most common valences, the real behavior of electrons is less simple.

Answer 2

Explanation:

hey mate here is your answer

the valency of an element can be defined as total number of electrons gained or loss by them for their stability. And to make that element stable it have 2 case

Case. 1 it will loss electrons to have 0 electrons in last shell

Case 2 it will gain electrons to make 8 electrons in last shell

Example Oxygen

Electronic configuration -2,6

it will gain 2 more electrons to make it stable so it's valency will be 2

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