Valence of copper - so you understand chemical bonds

06-21  Source: Network gathering  Views:249 


Valence of copper - so you understand chemical bonds

Copper (I) oxide is to blue copper (II) hydroxide.

The valence of an element

The valence of a chemical element gives the number of hydrogen atoms can bind or even replace an atom of the element.

  • It is a special characteristic of each substance, which is determined by its electron configuration. For example, hydrogen is always monovalent and divalent oxygen always. The elements of a main group of the periodic table of elements always have the same value.
  • Elements of the subgroups can occur in several denominations. In which reacts valence element, depends, for example, solvents or temperature.
  • For elements that can occur in several weights, the value in the word designation of the reaction product is a Roman numeral in parentheses after each item.
  • If you want to set up a chemical formula by using an equation, you must know the weights of the connected elements, because the sum of the values ​​of the individual elements must match. This results in the atomic number ratio.

Copper in various compounds

  • If the connected elements have the same value, you need the symbols just to write next to each other, such as the black copper (II) oxide, in which the copper is divalent. Oxygen, by which the copper reacts when oxidized, is also divalent. The formula is so CuO. Copper and oxygen particles are in one to one.
  • Copper can also be monovalent occur and form in the reaction with oxygen, the red copper (I) oxide. If you want to place the formula of this reaction product, you are the least common multiple of the values, in this case. 2
  • Share the values ​​of the individual elements and you will get the number of atoms per molecule. This Multiples A molecule of copper (I) oxide, consequently contain two atoms of copper, and one atom of oxygen. The formula is Cu (2) O.
  • The red copper (I) oxide is formed, for example, when copper is slowly oxidized in air, the black copper (II) oxide at higher heating.
  • More significant economic copper compounds in which copper occurs in various valencies are, for example copper (I) chloride, copper (II) chloride and copper (II) sulfate.

Copper can also trivalent and quadrivalent in very rare compounds occur in rare compounds.

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