Berilium, Magnesium, Calcium, Strontium, Barium and Radium
The elements can only be stable when it complete is octate in its outer most orbit has 8 electrons in its outer most orbit by gaining or losing energy
All elements in the oxygen family have 6 electrons in the outer orbit.
Oxygen, with a electron number of 8 there are two electrons on the first orbit ring and six an the outer ring(shell) those are the valence electrons
Hydrogen ions in water have zero. If you just mean neutral atoms in gas phase, then hydrogen, helium and lithium.
There are 5, it is in group 5 on the periodic table of the elements
Elements 114, 116, and 118 are in period 7 of the periodic table, so they will have 7 outer level electrons. Each period in the periodic table represents the number of electron shells an atom has, and the elements in the same period will have the same number of outer level electrons.
If you are talking about the valance electrons any elements in group 5 on the periodic table will have 5 valance electrons.
A neutral atom of oxygen has 6 electrons in it's most outer orbit. Generally, if you count horizontally from left-to-right on the periodic table, you get the number of electrons in its' most outer orbit. You start every row with 1, of course. :) Hope that helps!
There are two outer electrons in strontium (Sr) since it belongs to Group 2 of the periodic table. Group 2 elements have 2 electrons in their outer energy level.
they have the same number of outer electrons
They are in the same column.
Elements with full outer shells, the noble gas elements, are located in the column at the extreme right of the periodic table.