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 the atoms are relatively similar in size, the atom exchange method usually happens, where some of the atoms composing the metallic crystals are substituted with atoms of the other constituent.

When more electrons are added to a single atom, the additional electrons tend to more evenly fill in a volume of space around the nucleus so that the resulting collection ( sometimes termed the atom ’ s “ electron cloud ” ) tends toward a generally spherical zone of probability describing where the atom ’ s electrons will be found.

When two monosaccharides undergo dehydration synthesis, water is produced, as two hydrogen atoms and one oxygen atom are lost from the two monosaccharides ' hydroxyl group.

When the traversal encounters an atom through which the current path has already passed, a ghost atom is generated in order to keep the tree finite.

When an electron in an excited molecule or atom descends to a lower energy level, it emits a photon of light equal to the energy difference.

When oxygen binds to the iron complex, it causes the iron atom to move back toward the center of the plane of the porphyrin ring ( see moving diagram ).

When ionized hydrogen is written as " H < sup >+</ sup >" as in the solvation of classical acids such as hydrochloric acid, the hydronium ion, H < sub > 3 </ sub > O < sup >+</ sup >, is meant, not a literal ionized single hydrogen atom.

When implanted in a semiconductor, each dopant atom can create a charge carrier in the semiconductor after annealing.

When the energy difference between the atomic orbitals of two atoms is quite large, one atom's orbitals contribute almost entirely to the bonding orbitals, and the others atom ’ s orbitals contribute almost entirely to the antibonding orbitals.

* When an < sup > 235 </ sup > U atom captures a neutron, it is converted to an excited state of < sup > 236 </ sup > U. About 81 % of the excited < sup > 236 </ sup > U nuclei undergo fission, but the remainder decay to the ground state of < sup > 236 </ sup > U by emitting gamma radiation.

When an atom undergoes nuclear fission, a few neutrons ( the exact number depends on several factors ) are ejected from the reaction.

When a heavy atom undergoes nuclear fission it breaks into two or more fission fragments.

When an X-ray photon collides with an atom, the atom may absorb the energy of the photon and boost an electron to a higher orbital level or if the photon is very energetic, it may knock an electron from the atom altogether, causing the atom to ionize.

When such cascades recoil and reach the target surface with an energy above the surface binding energy, an atom can be ejected.

When an atom is probed by an external mechanism, such as a photon or a beam of electrons with energies in the range of 2 keV to 50 keV, a core state electron can be removed leaving behind a hole.

When an antihydrogen atom comes into contact with ordinary matter, its constituents quickly annihilate.

When a trigonal boron atom accepts a pair of electrons from a Lewis base, it adopts a tetrahedral configuration ( sp < sup > 3 </ sup >), and the octet rule is satisfied.

When they reached their neighbor's house, Pamela said a few polite words to Grace and kissed Melissa lightly on the forehead, the impulse prompted by a stray thought -- of the type to which she was frequently subject these days -- that they might never see one another again.

When my Uncle offered me a part-time job which would take care of my normal expenses and give me time to paint I accepted.

When, in 1832, the South Carolina nullifiers adopted the principle of state interposition which Madison had advanced in his old Virginia Resolve, they elicited no encouragement from that senior statesman.

When I try to work out my reasons for feeling that this passage is of critical significance, I come up with the following ideas, which I shall express very briefly here and revert to in a later essay.

This comes out in `` When The Bells Ring '', which describes the rallying of the peasants in southern Sweden to repel an invasion by the Danes.

When erosion threatened the foundation of their home in Harbert, Paula Sandburg planted grapevines and arranged the snow fences which helped hold the sands away.

She used to tell me, `` When I stand there and look at the flag blowing this way and that way, I have the wonderful, safe feeling that Americans are protected no matter which way the wind blows ''.

When Thompson and her daughter began a correspondence which included fervent verses from Pantasaph, Mrs. King felt a proper Victorian alarm.

When they were first written, there was evidently no thought of their being published, and those which refer to the writer's love for Mrs. Meynell particularly have the ring of truth.

When the United States entered the First World War Baker made certain that the Draft Act of 1917 prohibited the sale of liquor to men in uniform and that it provided for broad zones around the camps in which prostitution was outlawed.

When the historian encounters a situation in which he can perceive no visible cause and effect sequence, he should be alert to intuition and unconscious instinct as possible guides.

There is, of course, nothing new about dystopias, for they belong to a literary tradition which, including also the closely related satiric utopias, stretches from at least as far back as the eighteenth century and Swift's Gulliver's Travels to the twentieth century and Zamiatin's We, Capek's War With The Newts, Huxley's Brave New World, E. M. Forster's `` The Machine Stops '', C. S. Lewis's That Hideous Strength, and Orwell's Nineteen Eighty-Four, and which in science fiction is represented before the present deluge as early as Wells's trilogy, The Time Machine, `` A Story Of The Days To Come '', and When The Sleeper Wakes, and as recently as Jack Williamson's `` With Folded Hands '' ( 1947 ), the classic story of men replaced by their own robots.

When he came to Baltimore, he was leaving a team which was supposed to win the National League pennant, and he was joining what seemed to be a second division American League club.

When we become firm enough to stand for those ideals which we know to be right, when we become hard enough to refuse to aid nations which do not permit self-determination, when we become strong enough to resist any more drifts towards socialism in our own Nation, when we recognize that our enemy is Communism not war, and when we realize that concessions to Communists do not insure peace or freedom, then, and only then will we no longer be `` soft ''.

When Papa went out to do God's work, Stevie often accompanied him in the buggy, which was drawn by Violet, the new black mare.

When he had given the call a few moments thought, he went into the kitchen to ask Mrs. Yamata to prepare tea and sushi for the visitors, using the formal English china and the silver tea service which had been donated to the mission, then he went outside to inspect the grounds.

When he was bent over behind the wheel of the station wagon, feeling in his trouser cuffs for the ignition key which he had dropped a moment before, she came out of the house with an enormous Rumanian shawl over her head, which she had bought in that country during one of their trips abroad, and handed him a clean handkerchief through the window.

When the Export-Import Bank is prepared to act favorably upon an application, it will so notify the Department of Economic Affairs and will indicate the interest rate and the repayment period which would be used under the proposed loan.

When he showed this model as his `` solution '' as to how the Howe sewing machine operated, he was told he was `` wrong '', and discovered to his amazement that the Howe Machine, which was unknown to him in detail, used two threads while the one that he had perfected used only one.

When the budget goes to trustees for approval it is the president's budget, to which his faith and credit are committed ; ;

When a question contains two verbs, the response does not make clear which of them is being answered.

When typical reaction cells to which 0.3 of an atmosphere of oxygen had been added were illuminated, chlorine and phosgene were produced.

When a program comprises multiple object files, the linker combines these files into a unified executable program, resolving the symbols as it goes along.

When the transfer function comprises only a perfect gain constant A and perfect delay T

When Starke County was created, it included the area of land that today comprises the LaPorte County townships of Cass, Dewey, Hanna, and Prairie.

When ripe, this fruit comprises thick pulpy jelly encased in a waxy thin skinned shell.

When viewed from above ( e. g. from the chalk escarpments ) the vale appears quite uniform-a large expanse of green, lush, low-lying land-but in geological terms it comprises alternating belts of different clay and limestone soils ( and greensand at the foot of the chalk ), which give rise to subtle variations in topography and appearance, and which have an impact on land use.

When she was fifty, she published a collection of poetry Prometheus and Other Poems ( London: Jonathan Cape 1929 ) which comprises thirty-three lyric poems, four " dream poems ", one long poem, and a verse-play.

When Peshawar was annexed formally by the Britishers, the area that comprises the present Mohmand agency was ruled by the local tribesmen and was under the influence of Khan of Lalpura.

When fully loaded, the browser comprises three separate virtual layers, devoted to MPEG-4 & JPEG still image presentation, MPEG video presentation and OnScreen Display ( OSD ) presentation respectively.

When he was sworn into office, Peskin described District 3 ( it comprises Chinatown, North Beach, Nob Hill, and most of Russian Hill ) as the " living room " of San Francisco.

When entirely partitioned in, the living level comprises three bedrooms, bathroom and living room.

When river traffic " comprises large vessels, even at low speed, the consequences of pier failure can be catastrophic ".