Question

the number of electrons in the outermost shell of halogens is a)1 b)2 c)3 d) 7​

Answer 1

Answer:

7 is the right answer because Halogens belongs to 17 group element.

Answer 2

Number of electron in outermost shell of halogens is 7.

Explanation:

All five halogen elements fluorine, chlorine, bromine, iodine and astatine are present in VII A(17) group of the periodic table.

All halogens have 7 electrons in their outermost shell. All orbits are completely filled except outermost orbit.

They need one electron to complete their octet, hence the valency of halogens is 1.