Elements that contain the same number of valence electrons are referred to as being in the same group or column of the Periodic Table. This similarity in valence electron configuration often results in similar chemical properties among the elements in that group. For example, alkali metals in Group 1 all have one valence electron, leading to their characteristic reactivity.
Helium has two valence electrons
there are 8 electrons in the valence shell of neon
The entire Group 2A has 2 valence electrons; this includes sodium and calcium.
there are 8 electrons in the valence shell of neon
The word "valance" is used to describe electrons in the outer-most energy level of an atom. Oxygen has six valance electrons.
They have different numbers of valance electrons
It's valance shell does not contain an octet of eight valance electrons. That simple.
alkaline earth metals
8 valance electron
If you are talking about the valance electrons any elements in group 5 on the periodic table will have 5 valance electrons.
By looking at the group number you can tell how many valance electrons there are ex: Group 1= 1 valance electrons Group 2-12= 2 valance electrons Group 13= 3 valance electrons Group 14= 4 valance electrons Group 15= 5 valance electrons Group 16= 6 valance electrons Group 17= 7 valance electrons Group 18= 8 valance electrons
Halogens are group 17 elements. They have 7 valence electrons.
They have different numbers of valance electrons
Helium has two valence electrons
there are 8 electrons in the valence shell of neon
16.546 valence electrons are located in all rare earth elements.
The entire Group 2A has 2 valence electrons; this includes sodium and calcium.