Two oxygen atoms in a oxygen molecule share two electrons. Oxygen atoms only have 6 valence electrons (electrons in the outer shell). They want 8 electrons so they need to steal two or share two.
S = N – A. S = shared electrons : total number of electrons that will be shared and therefore are the bonding electrons. Divide “S” by 2 and you’ll have the number of bonds (lines) in the structure. N = needed electrons : needed is based on the octet rule which is 8 electrons for all atoms except hydrogen which is 2.
Does carbon have 2 or 4 electrons?
Carbon (from Latin: carbo “coal”) is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table.
What is electron sharing?
Electron ‘sharing’ occurs when the electrons in the outermost electron shell, or valence shell electrons, from one atom can be used to complete the outermost electron shell of another atom without being permanently transferred, as occurs in the formation of an ion.
When electrons are shared between two atoms, they make a bond called a covalent bond. Because two atoms are sharing one pair of electrons, this covalent bond is called a single bond. … These two atoms can do the same thing that the H atoms did; they share their unpaired electrons to make a covalent bond.