Chemistry

metal bonding A metal bond is a chemical bond formed by the use of electrons of valence electrons between metal atoms. Compounds form by metal bonds are called metals (if all atoms are equal). For example: In copper, copper atoms of twellef copper (bonded) or alloy (if there are different atoms) Formation of Metal Bonding Metals have few valence electrons and have low electronegativity. All kinds of metals. To generate positive ions / positive atoms / metal cations. The outer shell of the metal element is relatively loose (there are many empty spaces) so the electrons are delocalized, that is a state in which the valence electrons do not remain in their position on an atom, constantly moving from one atom to another. Metal valence electrons move very quickly around the core and mingle with other valence electrons in the bonds of the metal to hold up the "cloud" or "oceans" that make positive ions in them. Free electrons in this orbit as adhesives or gl...

BUFFER English: Buffer solution- Buffer capacity for pKa = 7 as percentage of maximum (Photo credit: Wikipedia) PH of a solution will decrease when added acid, this is due to in creased concentration of H  +  .  Conversely, when added base will raise the pH because the addition of base increases the concentration of OH  -  . Addition of water to acidic and basic solutions will change the pH of the solution, as the concentration of acid or base will decrease.  However, there is a solution that when added a little acid, base, or water does not change the pH significantly.  Such a solution is called a  buffer  solution (also called  buffer  or buffer  solution  ).  The  buffer  solution  has an acid component which can withstand the increase in pH and basic components which can withstand pH decline.  The component is a conjugate of weak base acids making up the  buffer solution  ...