In their outer electron shell, halogens have 7 valence electrons, one less than the number needed for a full shell. Therefore, it is much, much easier for the halogen to gain an electron in bonding than for it to lose 7 - the ionization energy (energy required to remove an electron from an atom) is quite high.
The third electron.
How difficult it is to remove an electron.
Halogens are not like metals. Halogens are elements missing one electron for full valency.
The outer electron shells of the halogens contain seven electrons, and need one more electron to have eight and become stable.
Halogens are reactive because they have high tendency to gain an electron which is called electron affinity to complete its octet and become stable...
Group 1 Alkali metals because the halogens need one electron to fill their outer electron shell.
Ionic bond is formedby transfer of electron between alkali metal and halogens.
Halogens have 7 electrons in their outermost electron shell. They gain an electron to get the noble gas configuration. So they make ions with -1 charge.
These elements are halogens.
Halogens typically gain an electron to achieve an octet and become , F- Cl-,, Br-, I-
All halogens or group 17 elements.
the halogens are electron withdrawing groups. e.g. F, Cl, etc
Group 1 metals react with halogens through electron configuration. Group 1 (Alkali) metals have one electron in their outer shell.