As they all have seven electrons in their valance shell:- 9fluorine2, 717chlorine2, 8, 735bromine2, 8, 18, 753iodine2, 8, 18, 18, 785astatine2, 8, 18, 32, 18, 7
They all are electronegative too.
The Periodic Table is organized in patterns, known as periodicity. All elements are organized according to their atomic mass, from lowest to highest. They are also organized in columns of the number of valence electrons. Halogens all possess the same number of valence electrons. So halogens are grouped together for the same reason why noble gases, alkali, and alkaline earth metals are grouped; because they possess the same number of valence electrons.
They all have the same reactive properties, all the Halogens have the same number of valance electrons making the react the same.
Halogens
The halogens are are the most active nonmetals. There're 5 non-metallic elements in the halogen family. The term "halogen" means "salt-former" & compounds containing halogens are called "salts".They are: Fluorine, Chlorine, Bromine, Iodine & Astatine
The Halogen family.
Metals are grouped together according to their electron structure.
The halogens
halogens is a family!
Halogens
The halogens are are the most active nonmetals. There're 5 non-metallic elements in the halogen family. The term "halogen" means "salt-former" & compounds containing halogens are called "salts".They are: Fluorine, Chlorine, Bromine, Iodine & Astatine
Group 17 or halogens
Halogens are in the group 17 of the periodic table.
The most reactive family of nonmetals is the halogen family.
It is part of the Halogens family
Metals are grouped together according to their electron structure.
The Halogen family.
Halogens
Iodine belongs to group 17. It is in the family called the halogens.
Fluorine is the ist member of Halogens family.