When a molten metal is mixed with another substance, there are two mechanisms that can cause an alloy to form, called atom exchange and the interstitial mechanism.

When this discovery was followed up in 1870, on the neighbouring Santorin ( Thera ), by representatives of the French School at Athens, much pottery of a class now known immediately to precede the typical late Aegean ware, and many stone and metal objects, were found.

When the country was still part of the former Yugoslavia, joint ventures and cooperation played a large role here ( motor industry, metal processing, textile industry / contract processing work, steel and chemicals ).

When Bathory's Under the Sign of the Black Mark was released, the album was considered a death metal record.

When a metal wire is subjected to electric force applied on its opposite ends, these free electrons rush in the direction of the force, thus forming what we call an electric current.

When a metal wire is connected across the two terminals of a DC voltage source such as a battery, the source places an electric field across the conductor.

When they struck it they knocked many electrons out of the metal.

* When the metal atoms are cubic close packed, ( ccp ), then filling all of the octahedral interstices with carbon achieves 1: 1 stoichiometry with the rock salt structure.

* When the metal atoms are hexagonal close packed, ( hcp ), as the octahedral interstices lie directly opposite each other on either side of the layer of metal atoms, filling only one of these with carbon achieves 2: 1 stoichiometry with the CdI < sub > 2 </ sub > structure.

When playing the rim of an okedō, however, it is important to hit only the outermost metal ring and not the actual rim of the drum body.

When used in art glass or studio glass glass is colored using closely guarded recipes that involve specific combinations of metal oxides, melting temperatures and ' cook ' times.

When Lindh arrived at Camp Rhino he was stripped and he was restrained to a stretcher, blindfolded and placed in a metal shipping container, which was procedure for dealing with a potentially dangerous detainee associated with a terrorist organization.

When submerged in water, hydrogen bubbles will almost unnoticeably begin to form on the surface of the metal, though if powdered it will react much more rapidly.

When considering the band structure and binding energy of a metal, it is necessary to take into account the positive potential caused by the specific arrangement of the ion cores – which is periodic in crystals.

When a metal ore is an ionic compound of that metal and a non-metal, the ore must usually be smelted — heated with a reducing agent — to extract the pure metal.

When pure Python code is not fast enough, time-critical functions can be rewritten in " closer to the metal " languages such as C, or by translating ( a dialect of ) Python code to C code using tools like Cython.

When air had become completely phlogisticated it would no longer serve to support combustion of any material, nor would a metal heated in it yield a calx ; nor could phlogisticated air support life, for the role of air in respiration was to remove the phlogiston from the body.

When Germain's correspondence with Gauss ceased, she took interest in a contest sponsored by the Paris Academy of Sciences concerning Ernst Chladni's experiments with vibrating metal plates.

When asked by one of the reporters if it was a good idea to hold this metal rod in the middle of a storm he replied that all was well.

When exposed to nitrogen clean titanium metal is covered with a titanium nitride layer.

When the pH of this solution rises, as a result of dilution by fresh water, these ions precipitate, forming " Yellow Boy " pollution.

When pH is too high, the concentration of hydrogen ions in the blood is too low, so the kidneys excrete bicarbonate ( HCO < sub > 3 </ sub >< sup >−</ sup >).

( ii ) When concentration of the ions is very high, the presence of charges on the ions appreciably effects the equilibrium.

When the planes of an ionic bond slide past one another, the resultant change in location shifts ions of the same charge into close proximity, resulting in the cleavage of the crystal ; such shift is not observed in covalently bonded crystals where fracture and crystal fragmentation occurs.

** Sodium chloride ( table salt ) or any other salt in water forms an electrolyte: When dissolving, salt dissociates into ions.

# When the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles, or specified groups of such particles.

When fused the mobile ions carry charge through the liquid.

When the solubility of the salt is very low the activity coefficients of the ions in solution are nearly equal to one.

When salt is dissociated, its constituent ions are simply surrounded by water molecules and their effects are visible ( e. g. the solution becomes electrolytic ).

When ammonia is dissolved in water, a tiny amount of it converts to ammonium ions:

When capsaicin is present, it alters the conformation of the SERCA, and thus reduces the ion movement ; as a result the ATP energy ( which would have been used to pump the ions ) is instead released as thermal energy.

When the membrane is in thermodynamic equilibrium ( i. e., no net flux of ions ), the membrane potential must be equal to the Nernst potential.

When the channels open, they allow an inward flow of sodium ions, which changes the electrochemical gradient, which in turn produces a further rise in the membrane potential.

When the muscle no longer needs to contract, the calcium ions are pumped from the sarcomere and back into storage in the sarcoplasmic reticulum.

When naming binary compounds with polyatomic ions:

When acid molecules dissociate, the concentration of the undissociated acid molecules ( HA ) decreases and the concentrations of the product ions ( H < sup >+</ sup > and A < sup >-</ sup >) increase.

When neurons go active, getting them back to their original ( polarized ) state requires actively pumping ions back and forth across the neuronal cell membranes.

When the chloride ions have sufficient velocity, the energy of the resulting iodide ions after the collision is much lower than expected, and it is theorized that energy is lost as a result of a full roundabout of the methyl group around the iodine atom before the actual displacement takes place.

When a voltage is applied to the porous electrode attached to the membrane, the moisture on the anode side ( dehumidifying side ) dissociates into hydrogen ions ( H +) and oxygen: the hydrogen ions migrate through membrane to be discharged on the cathode ( moisture discharging ) side where they react with oxygen in the air, resulting in water molecules ( gas ), being discharged.

When the trigger hairs are stimulated, an action potential ( mostly involving calcium ions — see calcium in biology ) is generated, which propagates across the lobes and stimulates cells in the lobes and in the midrib between them.

When driven by an external voltage applied to the electrodes, the electrolyte provides ions that flow to and from the electrodes, where charge-transferring ( also called faradaic or redox ) reactions can take place.