There can not be any reason, because the premise is not true: Group 7 elements become less rather than more reactive from fluorine to iodine.
The Halogens. Other elements in this group are Fluorine, Chlorine, Bromine and Astatine.
Fluorine, Chlorine, Bromine, Iodine, and Astatine.
Group 17 elements are called halogens. They include Fluorine-F, Chlorine-Cl, Bromine-Br, Iodine-I, and Astatine-At. They are all nonmetals and are reactive because they have 7 electrons in their outer shell, just one electron short of having a full shell.
A halogen is a group of elements that contain fluorine, chlorine, bromine, iodine, and astatine.
The Halogens Fluorine, Chlorine, Bromine, Iodine and Astatine
Group 7 elements are halogens. They have seven valance electrons& are highly reactive. They are: -Fluorine -Chlorine -Bromine -Iodine
The Halogens. Other elements in this group are Fluorine, Chlorine, Bromine and Astatine.
Halogens among halogens fluorine is most reactive
The halides (Group VII): fluorine, chlorine, bromine, & iodine.
The Halogens. Fluorine, Chlorine, Bromine, Iodine and Astatine, with Fluorine being the most reactive.
The most active element in Group 17 of the periodic table turns out the be the most reactive element among all of the elements. It's fluorine (F), and we sometimes hear it called the "hungry wolf" of the periodic table because it is so reactive.A link is provided to the Wikipedia post of the periodic table. This table features hyperlinks as part of its makeup. Each chemical element's symbol is a link to the Wikipedia post on that element.
Fluorine, Chlorine, Bromine, Iodine, and Astatine.
Group 17 elements are called halogens. They include Fluorine-F, Chlorine-Cl, Bromine-Br, Iodine-I, and Astatine-At. They are all nonmetals and are reactive because they have 7 electrons in their outer shell, just one electron short of having a full shell.
Iodine is not a "nobel" gas or even a noble gas but rather a nonmetal element that is not a gas at all at standard temperature and pressure, but a solid instead. -- Unlike the elements in the noble gas group such as neon, which are chemically very unreactive, iodine is quite reactive, like the other elements in its group such as fluorine and chlorine.
iodine is a nonmental which falls in the group elements called HALOGENS;chlorine,fluorine,bromine and iodine.
Chlorine is the second lightest member of the halogen elements or group 17.
A halogen is a group of elements that contain fluorine, chlorine, bromine, iodine, and astatine.