The word "valance" is used to describe electrons in the outer-most energy level of an atom.
Oxygen has six valance electrons.
You mean valence electron? 2 If your talking about Bohr Diagrams then it depends on the metal
8 electrons
There are 8 electrons in the outer level of all the noble gases except helium. This full outer level gives them stability and makes them less reactive. Helium, as a noble gas, has only 2 electrons in its outer level.
Halogens have 7 valance electrons, just one short of a stable configuration. When halogens react, they often gain the 1 electron needed to have 8 valence electrons, a filled outer energy level. Because the alkali metals have one valence electron, they are ideally suited to react with the halogens.
Potassium has 1 electron in its outer energy level. When it forms a bond, it typically donates this electron to another element, leaving it with a full outer energy level.
Nitrogen has 5 electrons in its outer shell, and Bromine has 7 electrons in its outer shell.
Uranium has 2 electrons on its outer energy level.
Boron has 3 electrons in it's outer level.
Vanadium has 5 electrons in its outer energy level.
7Fluorine has 7 electrons in the outer level.
10 electrons
Iodine has 7 electrons in its outer energy level.
Mercury has 2 electrons in its outer level, which is the 6th and final energy level for mercury.
There are 8 electrons in the outer energy level of xenon. Xenon belongs to the noble gas group on the periodic table, which have a full outer energy level with 8 electrons.
Magnesium has 2 electrons on its outer energy level.
There are three electrons in boron's outer energy level.
Sulfur has 6 electrons in its outer energy level. This means it needs 2 more electrons to fill its outer energy level, for a total of 8 electrons.