However, it reacts with molten metals, hydrogen, halogens, chalcogens and pnictogens to form various binary compounds.

However, despite the success of Drude's free electron model, it had one notable problem, in that it was unable to correctly explain the electronic contribution to the specific heat of metals, as well as the temperature dependence of resistivity at low temperatures.

However, the instability in the ratio between the two grew over the course of the 19th century, with the increase both in supply of these metals, particularly silver, and of trade.

) However, this has generally not been the case throughout the rest of history for circulation coins made of precious metals.

However, because fiat money is backed by government guarantee of a certain amount of goods and services, where the value of this is in turn determined by free market currency exchange rates, similar to the case for the international market exchange values which determines the value of metals which back commodity money, in practice there is very little economic difference between the two types of money ( types of currencies ).

However since 2000, Kazakhstan's economy grew sharply, aided by increased prices on world markets for Kazakhstan's leading exports — oil, metals and grain.

However, levels of metals recycling are generally low.

However, they warned that the recycling rates of some rare metals used in applications such as mobile phones, battery packs for hybrid cars and fuel cells are so low that unless future end-of-life recycling rates are dramatically stepped up these critical metals will become unavailable for use in modern technology.

However, by learning to get copper and tin by heating rocks and combining those two metals to make an alloy called bronze, the technology of metallurgy began about 3500 BC with the Bronze Age.

However, with the start of World War II the demand for metals made the manufacture of saws too expensive and many of these companies went out of business.

However, some metals have a mostly filled conduction band.

However, the + 1 state, which is far more prominent in thallium than the elements above it, recalls the chemistry of alkali metals, and thallium ( I ) ions are found geologically mostly in potassium-based ores, and ( when ingested ) are handled in many ways like potassium ions ( K < sup >+</ sup >) by ion pumps in living cells.

However, these countries debased their coins by switching to cheaper metals as the market value of silver rose above that of the face value.

However, charcoal is ineffective against metals such as sodium, potassium, and lithium, and alcohols and glycols ; it is also not recommended for ingestion of corrosive chemicals such as acids and alkalis.

However, mining and processing the various alternate metals that form the negative electrode may pose other types of environmental impact, depending on the metal, mining method, and environmental practices of the mine.

However, the limited choice of metals in this period, meant that he had to use copper as the braking medium acting on the disc.

However, they found that the recycling rates of many metals are very low.

However, this method alone ( as well as chlorination alone ) will not remove bacterially produced toxins, pesticides, heavy metals, etc.

However, there was no risk assess for pathogens or chemicals and heavy metals were not considered to be cancer causing agents.

However, metals and ceramics can be treated with certain impurities, and metals can be mechanically worked to make their grain structures directional.

However, the use of a face-centered cubic ( fcc ) or diamond cubic substrate allows the epitaxial growth of fcc transition metals.

However, even ductile metals will fracture when the strain becomes large enough-this is as a result of work hardening of the material, which causes it to become brittle.

However, in recent decades, for what doubtless are multiple reasons, an unannounced but nonetheless readily observable shift has occurred in both facets of national activity.

However, in the context of legal and civic policy, these controversies are less than novel.

However, despite the insight of many of his observations, his own conclusions are open to suspicion because of his failure to employ at all times the correct research methods.

However, there are still several types of calls that necessitate the use of telephone operators.

However, he states unequivocally `` the scandals in business are far less significant than the scandals in labor ''.

However, few are taxed, and the owners and location of most boats are unknown to the assessors on the date of assessment of town valuations.

However, the surface temperature gradient can produce erroneous vapor-pressure measurements for the bulk liquid helium unless precautions are taken to isolate the tube ( which passes through the surface to the vapor pressure bulb ) from the liquid helium surface.

However, if their United States income is not subject to the withholding of tax on wages, their returns are due June 15, 1962, if they use a calendar year, or the 15th day of the 6th month after the close of their fiscal year.

However, the aircraft which we have today are tied to large, `` soft '' airfields.

However, some formulas are used more than others.

However, there is also much to be gained by making use of the abilities of the local people who are available and interested in recreation.

However, there are photographs of suspended drops of cyclohexanol phthalate ( viscosity 155 poises ) suspended in corn syrup of 71 poises in a paper by Mason and Bartok.

However, any oxygen nonequivalence would shorten either the already extremely short Af interlayer distance of 2.55 A or the non-hydrogen-bonded Af interlayer interactions which are already quite short at 2.58 Aj.

However, as so many of the records are not certainly based on newborn snakes, these data must be taken tentatively ; ;

However, if these procedures are applied more often, conditioned emotional responses are temporarily abolished.

However, it cannot be presumed, informal though the structure of the population seems, that there are not well-defined roles within the system.

However, the differences in procedure are fundamental.

However, the regionally differentiated results, which appear below in tables, are interesting evidence of the problems of developing self-government under even the most favorable circumstances.

However, if Federal funds are used, it would be entirely appropriate to train workers for jobs which could be obtained elsewhere as well as for jobs in the area of chronic unemployment.

However, it is not known to either the union or the public precisely how much of a cost increase is caused by a given change in the basic wage rate, although the companies are presumed to have reliable estimates of this magnitude.

However, there are relatively few such political constituencies, and, as has been pointed out, there is seldom a clear-cut distinction between the educational interests of one social class and those of another.

However, modesty and triviality are different qualities.

`` However, evidence that the Axis powers are making significant preparations indicative of such an intention is being reported with increasing frequency from a variety of sources.