What is the valence of ?
Most people hear the word "valence of" do not fully understand what it is.So what is the valence of?The valence of - one of the terms that are used in the chemical structure.Valency essentially determines whether atoms to form chemical bonds.Quantitatively, the valence of - a number of connections to which the atom.
What is the valence of the element
Valence - a measure of the ability of an atom to join other atoms, forming with them, within the molecule, chemical bonds.The number of atoms equal to the number of its unpaired electrons.These bonds are called covalent.
unpaired electron - a free electron in the outer shell of an atom, which is connected in a pair with another outer electron atom.Each pair of electrons called "e", and each of the electron - the valence.Since the definition of "valence" - is the number of electron pairs in which one atom is bonded to another atom.
Valence can be represented schematically in the structural chemical formulas.When it is not necessary to use a simple formula where valency is not specified.
maximum valence of the chemical elements in the same group of the periodic table is the sequence number of the group.Atoms of the same element may have different valence of different chemical compounds.The polarity of covalent bonds, which are formed at the same time is not considered.That's why a valence has no badge yet.Also valence may not be negative and equal to zero.
number of divalent oxygen atoms or monovalent atoms of hydrogen is considered to be a quantitative measure of the chemical element.But when you need to determine the valence, and you can use other elements, the valence of which reliably known.Determine the valence of the chemical elements, you can read our article "How to determine the valence of?".
Sometimes the term "valency" equate to the concept of the "degree of oxidation", but it is not, although sometimes these figures are really the same.Oxidation - a formal term that refers to a possible charge that atom would have received if its electron pairs have moved to a more electrically negative atoms.Here the degree of oxidation can be a sign of the charge and is expressed in units.This term is common in inorganic chemistry, as in inorganic compounds difficult to judge the valence.Conversely, use of organic chemistry valence because it has a large molecular structure of the organic compounds.
Now you know what is the valence of the chemical elements!