The outer orbital, or valence shell, around the nucleus of an atom possess what are commonly called valence shell electrons. They represent the electrons available to share with another atom for the formation of covalent bonds between atoms. For Na, or sodium, in its standard atomic state there is only 1 valence shell electron. This number increases as you go to the right across the Periodic Table until the number of valence shell electrons reaches 8. This is noted by the Column number (i.e. I, II, III, etc.). Carbon has four, Nitrogen has five, Oxygen has 6, and Fluorine has 7. Xenon, Argon and the other 8th column elements are called the noble gases and they all have 8 valence electrons.
5
sodium has one valence electron
Seven (7)
Xenon is found in group 18. It has an electronic configuration of 2, 8, 18, 18, 8 and has eight valence electrons (or eight electrons in the outer most orbital).
None - the electron goes from sodium TO the chlorine.
Be (beryllium) has four electrons total: the first orbital, the 1s orbital, has two, which leaves two electrons in the outer shell.
5
Sodium has one electron in its outer ring.
Valence electrons are electrons found in the outer orbital (shell of an atom) They are the electrons used for bonding
There are 2 electrons in the valence orbital of a Magnesium atom.
sodium has one valence electron
Seven (7)
Xenon is found in group 18. It has an electronic configuration of 2, 8, 18, 18, 8 and has eight valence electrons (or eight electrons in the outer most orbital).
Nitrogen has 5 valence electrons. Valence electrons are the electrons that are found in the outer most shell of an atom, and are consequently the electrons that move from atom to atom in the formation of compounds. The reason for this is a result of the electron configuration. A nitrogen atom has 3 orbitals; the 1s orbital, the 2s orbital, and the 2p orbital. In this case, the 2s and 2p orbitals are the valence orbitals, as they have the electrons with the most energy. With 7 protons, a neutral nitrogen atom has 7 electrons. The s orbitals can only hold 2 electrons, and the p orbitals can hold up to 6 electrons. The 1s orbital is filled first, leaving five electrons, then the 2s orbital is filled, leaving 3 electrons, and then these remaining electrons fill the 2p orbital halfway. There are a total of 5 electrons in the 2s and 2p orbitals, and since these orbitals have the most energy, there are 5 valence electrons.
None - the electron goes from sodium TO the chlorine.
If the outer orbital is not full of electrons, the atom is unstable. It will react with other atoms to fill its outer shell.
Ionic bonding Sodium is an alkali metal, and chlorine is a halogen. This means that sodium contains one electron in its outer orbital and chlorine contains seven electrons in its outer orbital. One electron moves from the sodium atom and attaches to the chlorine atom to fill its outer orbital. This is the creation of two ions (sodium Na+ and chloride Cl-) and the result is table salt.