Elements with the valence-shell electron configuration ns2np5

Elements with the valence-shell electron configuration ns2np5

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Answer : This element belongs to the member of halogen group(group 17).

Explanation :

The valence-shell electronic configuration is [tex]ns_2np_5[/tex]

in this electronic configuration we see that there are 7 valence electrons in the element.

In the periodic table, Halogen is the group which has 7 valence electrons.

The element in halogen group are Florine, chlorine, bromine, iodine and astatine.

Dark shaded region is the halogen group(group 17)

The image of periodic table is shown below.

[tex]State where in the periodic table these elements appear: elements with the valence-shell electron c[/tex]



The answer to your question is:  Fluorine, Chlorine, Bromine, Iodine


Electron configuration              ns² np⁵

We observe that this electron configuration finishes in "p". Elements from groups IIIA to VIIIA finish their electron configuration in "p".

Elements in Group IIIA    finish in p¹

                    Group IVA    finish in p²

                    Group VA    finish in p³

                    Group VIA   finish in p⁴

                   Group VIIA  finish in p⁵

                    Group VIIIA finish in p⁶

Then, the list of elements with this electron configuration is:

Fluorine, Chlorine, Bromine, Iodine