When this rule is broken, giving the " molecule " a charge, the result is sometimes named a molecular ion or a polyatomic ion.

When applied to the simplest two-electron molecule, H < sub > 2 </ sub >, valence bond theory, even at the simplest Heitler-London approach, gives a much closer approximation to the bond energy, and it provides a much more accurate representation of the behavior of the electrons as chemical bonds are formed and broken.

When cells enter mitosis, the sister chromatids ( which represent the two copies of each chromosomal DNA molecule resulting from DNA replication earlier in the cell cycle and packaged by histones and other proteins into chromatin ) are linked all along their length by the action of the cohesin complex.

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 is not bound, a very weakly bonded water molecule fills the site, forming a distorted octahedron.

When red cells reach the end of their life due to aging or defects, they are broken down in spleen, the hemoglobin molecule is broken up and the iron gets recycled.

When trying to define rigorously whether an arrangement of atoms is " sufficiently stable " to be considered a molecule, IUPAC suggests that it " must correspond to a depression on the potential energy surface that is deep enough to confine at least one vibrational state ".

When proteins bind specifically to other copies of the same molecule, they can oligomerize to form fibrils ; this process occurs often in structural proteins that consist of globular monomers that self-associate to form rigid fibers.

When the functional group attacking the peptide bond is a thiol, hydroxyl or amine, the resulting molecule may be called a cyclol or, more specifically, a thiacyclol, an oxacyclol or an azacyclol, respectively.

When a chlorophyll molecule at the core of the photosystem II reaction center obtains sufficient excitation energy from the adjacent antenna pigments, an electron is transferred to the primary electron-acceptor molecule, pheophytin, through a process called photoinduced charge separation.

When a ribosome finishes reading an mRNA molecule, these two subunits split apart.

When one water molecule is lost another is pulled along by the processes of cohesion and adhesion.

When the activation energy is given in molecular units instead of molar units, e. g., joules per molecule instead of joules per mole, the Boltzmann constant is used instead of the gas constant.

When the molecule relaxes it emits a photon and it returns to a different rotational or vibrational state.

When glycogen stores are not available in the cells, fat ( triacylglycerol ) is cleaved to provide 3 fatty acid chains and 1 glycerol molecule in a process known as lipolysis.

When meat is in its raw state, the iron atom is in the + 2 oxidation state, and is bound to a dioxygen molecule ( O < sub > 2 </ sub >).

When a faster-than-average molecule from A flies towards the trapdoor, the demon opens it, and the molecule will fly from A to B.

When this small molecule is water, it is known as a dehydration reaction ; other possible small molecules lost are hydrogen chloride, methanol, or acetic acid.

When the UV photon strikes a phosphor molecule, it momentarily raises the energy level of an outer orbit electron in the phosphor molecule, moving the electron from a stable to an unstable state ; the electron then sheds the excess energy as a photon at a lower energy level than UV light ; the lower energy photons are mostly in the infrared range but about 40 % are in the visible light range.

When a molecule absorbs a photon, it increases the energy of the molecule.

When cooked in broth, gluten absorbs some of the surrounding liquid ( including the taste ) and becomes firm to the bite.

"," When the engine absorbs heat energy, the absorbed heat energy comes with entropy.

When ice melts, it absorbs as much energy as it would take to heat an equivalent mass of water by 80 ° C.

When Jean absorbs Psylocke's specialized telepathic powers, her own telepathy is increased to the point that she can physically manifest her telepathy as a psionic firebird whose claws can inflict both physical and mental damage.

When an electron absorbs energy either from light ( photons ) or heat ( phonons ), it receives that incident quantum of energy.

When a large fissile atomic nucleus such as uranium-235 or plutonium-239 absorbs a neutron, it may undergo nuclear fission.

When one promotion absorbs or purchases another, the titles from the defunct promotion may continue to be defended in the new promotion or be decommissioned.

When an electron absorbs energy either from light ( photons ) or heat ( phonons ), it receives that incident quanta of energy.

When dry it is a light flaky powder, which readily absorbs up to 40 % of its weight in atmospheric water.

When either of the two chlorophyll a molecules at the reaction center absorbs energy, an electron is excited and transferred to an electron-acceptor molecule.

When an electron in the system absorbs a photon of light of the right wavelength, it can be promoted to a higher energy level.

When the nucleus of uranium-235 absorbs a neutron, it undergoes nuclear fission, splitting into two " fission products " and releasing energy and, on average, 2. 5 neutrons.

When an object is pulled in the direction of motion, it gains momentum and energy, but when the object is already traveling near the speed of light, it cannot move much faster, no matter how much energy it absorbs.

When the right people come together, they bring the right thing out of each other ... With the right person, it becomes a situation of being rather than playing ... The role absorbs you and you become it.

When an electron absorbs energy in the form of one or more photons, then it moves to a more outer shell depending on the amount of energy gained.

When Carnage absorbs too much force, Mordo brings him back to his lair to drain the power into an urn.

When Lykos absorbs the energies of superhuman mutants, he transforms into Sauron, and gains a portion of that mutant's powers temporarily.

When Earth is threatened by Ego the Living Planet, Quasar absorbs Ego's essence and exiles himself into space, for fear of Ego expanding to planet-size.

When photosystem II absorbs light, electrons in the reaction-center chlorophyll are excited to a higher energy level and are trapped by the primary electron acceptors.

When David learns of a mental block within his head that prevents him from keeping the information he absorbs permanently, he asks for Emma Frost's aid in removing it.

When a system ( be it a molecule or atom ) absorbs a photon, it gains energy and enters an excited state.

When the control nanites start to infect the world, Wakanda is one of its victims when The Fold absorbs some mercenaries into its ranks.

" When the titanium dioxide absorbs ultraviolet light, it becomes powerfully reactive, breaking down pollutants that come in contact with the concrete.