Halides have 7 valence electrons, but the halide ion, haven gained an electron has 8 valence electrons
There are 7 valence electrons in elements of group-17. They are called halogens.
Aluminium has three valence electrons.
They share many properties, but one is that they all have 7 valence electrons.
The halogens, or inert gases, have full outer shells. Helium has 2 valence electrons in its outermost shell, and the other inert gases have eight. Wikipedia has a good entry on this: http://en.wikipedia.org/wiki/Valence_electron
The halogens are the group seven, the group right before the noble gases. They require 1 electron for a full outer shell. So they have 7 valence electrons. (s2 px2 py2 pz1)
Halogens have 7 valence electrons.
Halogens each have 7 valence electrons.
The number of electrons are different from one to another, however all of them have seven electrons in the valence shell.
A fluorine atom has seven valence electrons, as do all halogens.
There are 7 valence electrons in elements of group-17. They are called halogens.
Halogens are group 17 elements. They have 7 valence electrons.
Aluminium has three valence electrons.
Both iodine and chlorine are halogens (group 17) and have 7 valence electrons.
7 electrons are on the outer (valence) shells of all halogens
Fluorine is a halogen. All halogens have 7 valence electrons. There are thus 7 valence electrons for Fluorine, 2 in the 2s orbital, and 5 in the 2p orbitals.
They share many properties, but one is that they all have 7 valence electrons.
All halogens (group 17) have 7 valence electrons.Electronic Configuration of Br = 1s22s22p63s23p64s24p5Number of e- in valence shell (outmost s and p-orbital) = 2 + 5 = 7e-