Although all the nuclei of all atoms belonging to one element will have the same number of protons, they may not necessarily have the same number of neutrons ; such atoms are termed isotopes.

Although this difference is trivial in bulk chemistry calculations, it can result in complete failure in situations where the behavior of individual molecules matters, such as in mass spectrometry and particle physics ( where the mixture of isotopes does not act as an average ).

Although < sup > 4 </ sup > He continues to be produced by other mechanisms ( such as stellar fusion and alpha decay ) and trace amounts of < sup > 1 </ sup > H continue to be produced by spallation and certain types of radioactive decay ( proton emission and neutron emission ), most of the mass of these isotopes in the universe, and all but the insignificant traces of the < sup > 3 </ sup > He and deuterium in the universe produced by rare processes such as cluster decay, are thought to have been produced in the Big Bang.

) Although radiation levels in the water have declined over time, the longer-lived isotopes will continue to pose risks for tens of thousands of years.

Although 25 isotopes are known for sulfur, only four are stable and of geochemical importance.

Although fluorine ( F ) has 18 known isotopes from < sup > 14 </ sup > F to < sup > 31 </ sup > F and one isomer (< sup > 18m </ sup > F ), only one of these isotopes is stable, that is, fluorine-19 ; as such, it is a monoisotopic element.

Although thorium ( Th ) has 6 naturally occurring isotopes, none of these isotopes are stable ; however, one isotope, < sup > 232 </ sup > Th, is relatively stable, with a half-life of 14. 05 billion years, considerably longer than the age of the earth, and even slightly longer than the generally-accepted age of the universe.

Although phosphorus ( P ) has 23 isotopes from < sup > 24 </ sup > P to < sup > 46 </ sup > P, only one of these isotopes is stable < sup > 31 </ sup > P ; as such, it is considered a monoisotopic element.

Although beryllium ( Be ) has 12 known isotopes, only one of these isotopes () is stable and a primordial nuclide.

Although there are eight known isotopes of helium ( He ) ( standard atomic mass: 4. 002602 ( 2 ) u ), only helium-3 () and helium-4 () are stable.

Although single genes have little effect on complex traits and interact heavily both between themselves and with the external factors, research is underway to unravel possible molecular mechanisms underlying anxiety and comorbid conditions.

Although the hardware is limited to four separate sound channels, software such as OctaMED uses software mixing to allow eight or more virtual channels, and it was possible for software to mix two hardware channels to achieve a single 14-bit resolution channel by playing with the volumes of the channels in such a way that one of the source channels contributes the most significant bits and the other the least.

Although " Takes A Little Time " was a moderate hit single, the album failed to sell like the previous two albums, which had both gone multi-platinum.

Although BR was a single entity, it was divided into six ( later five ) regional authorities in accordance with the existing areas of operation.

Although his success lasted only a year and a half before his death in an airplane crash, Holly is described by critic Bruce Eder as " the single most influential creative force in early rock and roll.

Although there is no strong evidence for any single theory, many independent theories exist, some blaming storms, some capsizing, and some suggesting that wartime enemy activity was to blame for the loss.

" Although based on a simplistic analysis of internal strife in Greece and Turkey, it became the single dominating influence over U. S. policy until at least the Vietnam War.

Although some say Judaism is noncreedal in nature, others say it recognizes a single creed, the Shema Yisrael, which begins: " Hear, O Israel: the LORD our God, the LORD is one.

Although the two parts are now normally published as a single work, Don Quixote, Part Two was a sequel published ten years after the original novel.

Although bacteriophages were first described in 1927, it was only in 1959 that Sinshemer working with phage Phi X 174 showed that they could possess single stranded DNA genomes.

Although the track was edited out of the final cut, it would later be re-recorded and released as " Safe " on the B-side of Bowie's 2002 single " Everyone Says ' Hi '".

Although the single sold poorly, the popularity of Jones's appearance on the show resulted in " Girl " becoming his best remembered solo hit, even though it was not included in the album.

Although many of the results in Elements originated with earlier mathematicians, one of Euclid's accomplishments was to present them in a single, logically coherent framework, making it easy to use and easy to reference, including a system of rigorous mathematical proofs that remains the basis of mathematics 23 centuries later.

Although it never uses the term, The Church of Jesus Christ of Latter-day Saints ( The Mormon Church ) is episcopal, rather than presbyterian or congregational, in the sense that it has a strict hierarchy of leadership from the local bishop up to a single prophet / president, believed to be personally authorized and guided by Jesus Christ.

Although there are important differences between them, all of them were materialists who believed that the world was made up of a single substance, matter, the motions and properties of which could be used to explain all phenomena.

Although its file format also allows for multiple such streams to be concatenated ( zipped files are simply decompressed concatenated as if they were originally one file ), gzip is normally used to compress just single files.

Although turret presses operate much like single stage presses, they eliminate much of the setup time required in positioning individual dies correctly.

" Although it was a single sentence in a 461-page book, reviewers focused on it.

Although the school was a single institution, it was divided into two parts: a grammar school called the collège or schola privata and an advanced school called the académie or schola publica.

Although a single EPSP was not enough to fire an action potential in the motor neuron, the sum of several EPSPs from multiple sensory neurons synapsing onto the motor neuron could cause the motor neuron to fire, thus contracting the quadriceps.

Although he is often characterized as an " architect " exclusively, as James Beck has observed, " to single out one of Leon Battista's ' fields ' over others as somehow functionally independent and self-sufficient is of no help at all to any effort to characterize Alberti's extensive explorations in the fine arts.

Although they reign under constitutions, the monarchs of Brunei, Oman, Qatar, Saudi Arabia and Swaziland appear to continue to exercise more political influence than any other single source of authority in their nations, either by constitutional mandate or by tradition.

Although the term " metallic bond " is often used in contrast to the term " covalent bond ", it is preferable to use the term metallic bonding, because this type of bonding is collective in nature and a single " metallic bond " does not exist.

Although four songs were released as singles to promote the album ( lead single " Everything I Need ", " Man With Two Hearts ", " Maria ", and " Hard Luck Story "), only the first song charted in the US, and that only at No. 47.

Although they do share commonalities, contemporary Pagan religious movements are diverse and no single set of beliefs, practices, or texts are shared by them all.

Although the United States and the U.S.S.R. have been arguing whether there shall be four, five or six top assistants, the most important element in the situation is not the number of deputies but the manner in which these deputies are to do their work.

Although there are landscapes in the show ( one of the strongest is a vista of `` Gloucester Harbor '' in 1915 ), the human element was the compelling factor in Sloan's art.

Although it is the third element in the transuranic series, it was discovered fourth, after the heavier curium.

Although the element is only mildly toxic, it is a hazardous material as a metal and its radioisotopes present a high health risk in case of radiation leaks.

Although it is usually translated as " element ", the Chinese word xing literally means something like " changing states of being ", " permutations " or " metamorphoses of being ".

Although the term " clitic " can be used descriptively to refer to any element whose grammatical status is somewhere in between a typical word and a typical affix, linguists have proposed various definitions of " clitic " as a technical term.

Although every map element serves some purpose, convention only dictates inclusion of some elements, while others are considered optional.

Although the Fortune Deck resembles ( and can be used as ) a fortune-telling device, Everway treats the Deck only as a storytelling device and an element of the fictional setting.

Although the new element somewhat resembled arsenic and antimony in appearance, its combining ratios in the new element's compounds agreed with Mendeleev's predictions for a predicted relative of silicon.

Although lanthanum belongs to the element group called rare earth metals, it is not rare at all.

Although muster rolls were prepared as late as 1820, the element of compulsion was abandoned, and the militia was transformed into a volunteer force.

Although neon is a very common element in the universe and solar system ( it is fifth in cosmic abundance after hydrogen, helium, oxygen and carbon ), it is very rare on Earth.

Although the term is not used in the scientific literature either for a condensed form of matter, or as an element, there have been reports that, besides the free neutron, there may exist two bound forms of neutrons without protons.

Although not called " neutronium ", the National Nuclear Data Center's Nuclear Wallet Cards lists as its first " isotope " an " element " with the symbol n and atomic number Z = 0 and mass number A = 1.

Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth's crust and is more common than such metals as tin.

Although not directly comparable to SVG since it is a bitmap-based format, the Canvas element in HTML5 provides an approach to rendering dynamic graphics in HTML that is procedural rather than declarative: instead of specifying the shapes to draw in XML, the author executes drawing commands from a script.

Although Berzelius claimed to have first isolated vanadium in the 1830s, in 1867 Henry Enfield Roscoe showed that he had only obtained the oxide, and finally in 1869 Roscoe demonstrated a method to obtain the pure element.

Although the opti-challenge element of the game was used as a selling point, very little information exists about the technique itself, and no other game on the market has ever openly claimed to use opti-challenge graphics.

Although the Xia is an important element in early Chinese history, reliable information on the history of China before 13th century BC can only come from archaeological evidence since China's first established written system on a durable medium, the oracle bone script, did not exist until then.

# Although technology might be a prime element in many public issues, nontechnical factors take precedence in technology-policy decisions.

Johnson went on to say that " by the time I was a third of the way through, I had to suppress a strong impulse to throw the thing away ", Although Johnson recognised that in Bond there " was a social phenomenon of some importance ", this was as a negative element, as the phenomenon concerned three " three basic ingredients in Dr No, all unhealthy, all thoroughly English: the sadism of a schoolboy bully, the mechanical, two-dimensional sex-longings of a frustrated adolescent, and the crude, snob-cravings of a suburban adult.

Although many Chinese lament the strong importance of guanxi in their culture, they still consider guanxi as a Chinese element that should not be denied.