As George Gamow put in his science-popularizing book, One, Two, Three ... Infinity ( 1947 ), " The metallic substances differ from all other materials by the fact that the outer shells of their atoms are bound rather loosely, and often let one of their electrons go free.

Two carbon atoms are oxidized to CO < sub > 2 </ sub >, the energy from these reactions being transferred to other metabolic processes by GTP ( or ATP ), and as electrons in NADH and QH < sub > 2 </ sub >.

Two electrons are passed from two cytochrome c's, through the Cu < sub > A </ sub > and cytochrome a sites to the cytochrome a < sub > 3 </ sub >- Cu < sub > B </ sub > binuclear center, reducing the metals to the Fe < sup >+ 2 </ sup > form and Cu < sup >+ 1 </ sup >.

Two metals in electrical contact share the same electrons, so that the " tug-of-war " at each surface is analogous to competition for free electrons between the two materials.

Two or more molecular entities ( atoms, molecules, or ions ) are described as being isoelectronic with each other if they have the same number of electrons or a similar electron configuration and the same structure ( number and connectivity of atoms ), regardless of the nature of the elements involved.

Two electrons within the same spin orbital result in no wave function.

Two of these electrons are in an MO that has equal contributions from all six atoms.

Two atoms can be bonded by sharing more than one pair of electrons.

" Two water molecules must be split in order to gain 4 electrons ( as well as O2, the oxygen eudicots require for survival ).

Two electrons need to be passed to an electron acceptor for the process of photosynthesis to proceed.

Two electrons are finally accepted by oxygen in the matrix to complete the electron transport chain.

Two carbon atoms share two electrons each with hydrogen atoms to form single bonds.

Two common mechanisms by which electrons and nuclei interact are the Fermi contact interaction and by dipolar interaction.

Two polyphosphide ions, found in and found in K < sub > 5 </ sub > P < sub > 4 </ sub >, are radical anions with an odd number of valence electrons making both compounds paramagnetic.

* A semiconductor firm started in Silicon Valley in 1972 ( mentioned on page 178 of the book " Crystals, electrons, transistors: from scholar's study to industrial research ", written by Michael Eckert and Helmut Schubert and published by the American Institute of Physics in 1990, and on the documentary " Steve Jobs: Billion Dollar Hippy ", broadcast by BBC Two on December 14, 2011 )

Two species of hamster belonging to the genus Phodopus, Campbell's dwarf hamster ( Phodopus campbelli ) and the Djungarian hamster ( Phodopus sungorus ), and two of the genus Cricetulus, the Chinese striped hamster ( Cricetulus barabensis ) and the Chinese hamster ( Cricetulus griseus ) have a dark stripe down their heads to their tails.

Two muscle fibers belonging to the same motor unit are identified and the temporal variability in their firing patterns are measured.

* 1879 – War of the Pacific: Two Chilean ships blocking the harbor of Iquique ( then belonging to Peru ) battle two Peruvian vessels in the Battle of Iquique.

Two years later in Paris he repeated the proposal, listing the stone as one of several key items belonging to Egypt's cultural heritage, a list which also included the iconic bust of Nefertiti in the Egyptian Museum of Berlin ; a statue of the Great Pyramid architect Hemiunu in the Roemer-und-Pelizaeus-Museum in Hildesheim, Germany ; the Dendara Temple Zodiac in the Louvre in Paris ; and the bust of Ankhhaf from the Museum of Fine Arts, Boston.

" Two centuries later, Europeans perceived Saracens as poor, uneducated idolaters belonging to a group wholly separate from the Arabs who brought Aristotle to the Latin West and the Moors and Berbers fighting Christians in Spain ; someone who got all of his or her information on Islam from medieval sources would not conclude the three groups represented one continuous culture.

Two car ferries belonging to the Weiße Flotte operate every half-an-hour between the Zudar peninsula on Rügen and Stahlbrode on the mainland, halfway between Stralsund and Greifswald.

Two excellent early examples of this form, belonging respectively to Archbishop St. Heribert ( 1021 ) and Archbishop St. Anno ( d. 1075 ), are preserved in Siegburg, Archdiocese of Cologne.

Today, only Sperry, Granite Park, and Belton Chalets are still in operation, while a building formerly belonging to Two Medicine Chalet is now Two Medicine Store.

Two seals bearing her name, belonging to her servants and dating to the Sargonic period, have been excavated at the Royal Cemetery at Ur.

Two possible other dated objects, one dated to a Year 19 and another year 20, have been suggested as belonging to him, but neither have been accepted as dating to his reign.

Two large swine production companies that export mainly to the USA, Germany and Japan, a recycled containerboard mill and box factory privately owned by Sonoran investors, as well as one brewery belonging to the FEMSA group ( recently acquired from Heineken ), are among the main industries in Navojoa.

Two ships of the United States Navy have borne the name USS Perch, named in honor of the perch, a type of fresh-water spiny-finned fish belonging to the family Percidae.

Two hotel employees ( Sorrell Booke and Stefan Gierasch ) attempt to steal the jewels belonging to Mrs. Van Hoskins, while Mr. Jones attempts to get the bag belonging to Mr. Smith.

Two men with the title " auditors of the Jews " were entrusted with the execution of this ordinance, and were to take cognizance of all claims that might arise in connection with goods belonging to the Jews which had been sold before the expulsion for less than half of what was regarded as a fair price.

Two notable monuments in this province are the Hatuniye Medrese of the 15th century, built by Sultan Bayezid II, and a Seljuk bridge spanning the Yeşilırmak River, belonging to the 12th century.

Two inscriptions carved on the face of Alvand mountain, belonging to Darius and Xerxes.

Two fossil species are also recognised, each belonging to a separate genus.

Two of the most important insect orders, Lepidoptera and Diptera, along with Trichoptera, probably evolved from ancestors belonging to, or strictly related to, the Mecoptera.

Two pairs of bronze legs, belonging to sellae curules, preserved in the museum at Naples ( Museo Borbonico, vol.

Two items belonging to each of the " accursed twelve " ( that is, Dimwit Flathead and his eleven siblings ) must be placed into the cauldron and the magic word must be spoken.

Two tribes of the Andaman Islands, belonging to India, have sought to avoid contact with the outside world.

Two historical bridging points exist at Bridgnorth to the North and Bewdley to the South, and whilst the bridge belonging to the former National Coal Board was deemed unsafe for general vehicular traffic there exists in Hampton Loade a private bridge used by the emergency services.

Two were in the same band 18 years ago ; ;

# Two assets with identical cash flows do not trade at the same price.

Two sets A and B are defined to be equal when they have precisely the same elements, that is, if every element of A is an element of B and every element of B is an element of A.

Two companies of Bersaglieri who arrived at the same moment could not help and were cut down.

Two sets are said to have the same cardinality or cardinal number if there exists a bijection ( a one-to-one correspondence ) between them.

Two sets have the same cardinal number if and only if there is a bijection between them.

Two of the most notable differences are that the balls are always played in the same sequence ( blue, red, black, yellow ) throughout the game, and that a ball's " deadness " on other balls is carried over from turn to turn until the ball has been " cleared " by scoring its next hoop.

He received accolades for his portrayal of Sydney Carton in a made for television version of A Tale of Two Cities ( 1980 ), co-starred with Dennis Hopper in The Osterman Weekend ( 1983 ), which was based on the Robert Ludlum novel of the same name, and co-starred with Goldie Hawn in Protocol ( 1984 ).

Two languages are genetically related if they descended from the same ancestor language.

" Don Quixote, Part Two, published by the same press as its predecessor, appeared late in 1615, and quickly reprinted in Brussels and Valencia ( 1616 ) and Lisbon ( 1617 ).

Two ( equivalent ) Zeners in series and in reverse order, in the same package, constitute a transient absorber ( or Transorb, a registered trademark ).

Two elements of the set are considered equivalent ( with respect to the equivalence relation ) if and only if they are elements of the same cell.

Two such functions are deemed equivalent when their respective sets of fixpoints have the same cardinality, corresponding to cycles of length one in a permutation.

Two styles of electron counting are popular and both give the same result.

Two days later, the same three guilds made a second attempt and after almost 4 hours, successfully killed the sleeper.

He was very active in furthering the accession of the French candidate for the throne of Spain, Philip V. Two years later, Vendôme having died in the interval, Alberoni was appointed consular agent for Parma at Philip's court, where he was the royal favourite, being raised at the same time to the dignity of count.

Two or more glyphs which have the same significance, whether used interchangeably or chosen depending on context, are called allographs of each other.

Two of the letters from a " kingdom of Kheta "— apparently located in the same general region as the Mesopotamian references to " land of Hatti "— were written in standard Akkadian cuneiform script, but in an unknown language ; although scholars could read it, no one could understand it.

Two spaces with a homeomorphism between them are called homeomorphic, and from a topological viewpoint they are the same.

Two objects may be considered the same for one purpose, and yet different for another.

Two other terms often associated with Isolationism, but not necessarily the same as Isolationism, are:

Two brothers, Jabez Carter Hornblower and Jonathan Hornblower Jnr also started to build engines about the same time.

Two of John ’ s close allies, Emperor Otto and Count Raymond VI of Toulouse, had already suffered the same punishment themselves, and the significance of excommunication had been somewhat devalued.

It may also resemble a jumping spin roundhouse kick ( developed by James ' Two Screens ' Perkins ) into a spinning hook kick, all in one jump and one spin although the difference is that both legs should remain in the air at the same time for a considerable amount of time.

Two years later he received honorary doctor status at Stockholm University, and in 2000 he received the same honor from his alma mater.