Question

The element ‘X’ has 7 electrons in the valence shell and shows valency 1. The element is???

Answer 1

it's your ans-

It will be the elements of 17th group.I

e.g. chlorine has 7 electrons on outer  most shell and show 1 valency.

Elements in 17th groups are-

Halogen, any of the six nonmetallic elements that constitute Group 17 of the periodic table. The halogen elements are-

fluorine (F),

chlorine (Cl),

bromine (Br),

iodine (I),

astatine (At),

tennessine (Ts)

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Answer 2

Answer:

it's your ans-

It will be the elements of 17th group.I

e.g. chlorine has 7 electrons on outer  most shell and show 1 valency.

Elements in 17th groups are-

Halogen, any of the six nonmetallic elements that constitute Group 17 of the periodic table. The halogen elements are-

fluorine (F),

chlorine (Cl),

bromine (Br),

iodine (I),

astatine (At),

tennessine (Ts)

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