Halogens

The halogens are a reactive group of elements located in the seventeenth group of the periodic table. They all have 7 valence electrons. They slowly get less reactive as you go down the table because of reducing electronegativity. They all have the -1 oxidation state which means they lose one valence electron to form a bond. They all form salts and strong acids. For example, hydrofluoric acid, fluoroantimonic acid, perchloric acid, chloroantimonic acid, bromic acid, hydrobromic acid, and hydroiodic acid. They are all very corrosive elements and should be handled with care.

There are 6 halogens

Fluorine- electron configuration: [He] 2s2 2p5 -Van der Waals radius: 147 pm

Chlorine- electron configuration: [Ne] 3s2 3p5 -Van der Waals radius:  175 pm

Bromine- electron configuration: [Ar] 3d10 4s2 4p5 -Van der Waals radius:  185 pm

Iodine- electron configuration: [Kr] 4d10 5s2 5p5 -Van der Waals radius:  198 pm

Astatine- electron configuration: [Xe] 4f14 5d10 6s2 6p5 -Van der Waals radius:  200 pm

Tennessine- electron configuration: [Rn] 5f14 6d10 7s2 7p5 -Van der Waals radius: N/A

As you have noticed, only halogens end with "ine".