127 - Chimica
... Summary: The reaction of [Re,(CO),,] with OH- gives first [Re,H(CO),]- and then, under more drastic conditions, the novel anion [Re2H,(CO),I2-, which can be reversibly protonated to give [ Re,H,(p-H)(CO),]-, whose structure has been elucidated by a X-ray investigation. Variable-temperature NMR spect ...
... Summary: The reaction of [Re,(CO),,] with OH- gives first [Re,H(CO),]- and then, under more drastic conditions, the novel anion [Re2H,(CO),I2-, which can be reversibly protonated to give [ Re,H,(p-H)(CO),]-, whose structure has been elucidated by a X-ray investigation. Variable-temperature NMR spect ...
CHAPTER-4 CHEMICAL BONDING AND
... two pair of electrons is called a double covalent bond, or simply a double bond. A double covalent bond is represented by two small horizontal lines (=) between the two atoms. E.g. O=O, O=C=O etc. TRIPLE COVALENT BOND: A covalent bond formed by the mutual sharing of three pair of electrons is called ...
... two pair of electrons is called a double covalent bond, or simply a double bond. A double covalent bond is represented by two small horizontal lines (=) between the two atoms. E.g. O=O, O=C=O etc. TRIPLE COVALENT BOND: A covalent bond formed by the mutual sharing of three pair of electrons is called ...
Chemical (Elemental) Analysis - Fritz-Haber
... radiation sources (classification) inductively coupled plasma (ICP) flame ...
... radiation sources (classification) inductively coupled plasma (ICP) flame ...
Annular Comb Gate
... beam was primarily carbon dioxide, but with some atmospheric and “P40”, a Open H+ Mode Heavy Mode mixture of argon and methane, in the system from previous runs. Notice that without a C-foil, the molecular gases do not dissociate. Note also, that the Collimator/Buncher width of the peaks appears to ...
... beam was primarily carbon dioxide, but with some atmospheric and “P40”, a Open H+ Mode Heavy Mode mixture of argon and methane, in the system from previous runs. Notice that without a C-foil, the molecular gases do not dissociate. Note also, that the Collimator/Buncher width of the peaks appears to ...
An extended X-ray object ejected from the PSR B1259
... Another scenario considered by K+14 assumed that the moving structure is a clump of matter ejected from the binary by the pulsar interaction with the decretion disk. The new data seem to support this scenario because the average projected velocity implies that the structure could indeed be launched ...
... Another scenario considered by K+14 assumed that the moving structure is a clump of matter ejected from the binary by the pulsar interaction with the decretion disk. The new data seem to support this scenario because the average projected velocity implies that the structure could indeed be launched ...
CP - Fundamentals
... We just learned that simple quantitative relationships based upon the idea of the law of simple proportions could be combined with other concepts from Dalton’s Atomic Theory to create a host of problems based upon the quantitative relationships between atoms in molecules. We learned to use unit fact ...
... We just learned that simple quantitative relationships based upon the idea of the law of simple proportions could be combined with other concepts from Dalton’s Atomic Theory to create a host of problems based upon the quantitative relationships between atoms in molecules. We learned to use unit fact ...
A Dozen Colliding-Wind X-Ray Binaries in the Star - UvA-DARE
... 2.87 Myr for a Z ¼ 0:001 (the solar metallicity Z ¼ 0:02) to 4.96 Myr for Z ¼ 0:04 (Meynet et al. 1994). Because R136 is only 2 Myr old, no star in it can have left the main sequence yet. It would therefore be quite remarkable if the star cluster were able to produce black holes before 2 Myr. We a ...
... 2.87 Myr for a Z ¼ 0:001 (the solar metallicity Z ¼ 0:02) to 4.96 Myr for Z ¼ 0:04 (Meynet et al. 1994). Because R136 is only 2 Myr old, no star in it can have left the main sequence yet. It would therefore be quite remarkable if the star cluster were able to produce black holes before 2 Myr. We a ...
chapter 23 the transition elements and their
... a) The cation is K+, potassium. The anion is [Ag(CN)2]− with the name dicyanoargentate (I) ion for the two cyanide ligands and the name of silver in an anion, argentate(I). The Roman numeral (I) indicates the oxidation number on Ag. O.N. for Ag = –1 – {2(–1)} = +1 since the complex ion has a charge ...
... a) The cation is K+, potassium. The anion is [Ag(CN)2]− with the name dicyanoargentate (I) ion for the two cyanide ligands and the name of silver in an anion, argentate(I). The Roman numeral (I) indicates the oxidation number on Ag. O.N. for Ag = –1 – {2(–1)} = +1 since the complex ion has a charge ...
BSPH 111 - Refresher Chemistry
... elements in the periodic table is classified according to its atomic number, which is the number of protons in that element's nucleus. Protons have a charge of +1, electrons have a charge of -1, and neutrons have no charge. Neutral atoms have the same number of electrons and protons, but they can ha ...
... elements in the periodic table is classified according to its atomic number, which is the number of protons in that element's nucleus. Protons have a charge of +1, electrons have a charge of -1, and neutrons have no charge. Neutral atoms have the same number of electrons and protons, but they can ha ...
University of Lusaka
... elements in the periodic table is classified according to its atomic number, which is the number of protons in that element's nucleus. Protons have a charge of +1, electrons have a charge of -1, and neutrons have no charge. Neutral atoms have the same number of electrons and protons, but they can ha ...
... elements in the periodic table is classified according to its atomic number, which is the number of protons in that element's nucleus. Protons have a charge of +1, electrons have a charge of -1, and neutrons have no charge. Neutral atoms have the same number of electrons and protons, but they can ha ...
Supramolecular Assemblies Built from Lanthanide
... cations (Figure 2). The latter are doubly bridged by two carboxylate groups, the corresponding 6ah molecules occupying the cavities of the CB6 molecules. Each cation is further bound to two carbonyl groups from each CB6 and to three water molecules, thus lying in a nine-coordinate environment of tr ...
... cations (Figure 2). The latter are doubly bridged by two carboxylate groups, the corresponding 6ah molecules occupying the cavities of the CB6 molecules. Each cation is further bound to two carbonyl groups from each CB6 and to three water molecules, thus lying in a nine-coordinate environment of tr ...
Quantitative Analysis of the Electrostatic
... established;8-11 however, only the deformation electron densities12-16 and electrostatic potentials17 for some simple molecules have been obtained up to now using gas-phase electron diffraction. The electrostatic potential in solids was studied by electron diffraction as well;18,19 however, the accu ...
... established;8-11 however, only the deformation electron densities12-16 and electrostatic potentials17 for some simple molecules have been obtained up to now using gas-phase electron diffraction. The electrostatic potential in solids was studied by electron diffraction as well;18,19 however, the accu ...
Metastable inner-shell molecular state
Metastable Innershell Molecular State (MIMS) is a class of ultra-high-energy short-lived molecules have the binding energy up to 1,000 times larger and bond length up to 100 times smaller than typical molecules. MIMS is formed by inner-shell electrons that are normally resistant to molecular formation. However, in stellar conditions, the inner-shell electrons become reactive to form molecular structures (MIMS) from combinations of all elements in the periodic table. MIMS upon dissociation can emit x-ray photons with energies up to 100 keV at extremely high conversion efficiencies from compression energy to photon energy. MIMS is predicted to exist and dominate radiation processes in extreme astrophysical environments, such as large planet cores, star interiors, and black hole and neutron star surroundings. There, MIMS is predicted to enable highly energy-efficient transformation of the stellar compression energy into the radiation energy.The right schematic illustration shows the proposed four stages of the K-shell MIMS (K-MIMS) formation and x-ray generation process. Stage I: Individual atoms are subjected to the stellar compression and ready for absorbing the compression energy. Stage II: The outer electron shells fuse together under increasing ""stellar"" pressure. Stage III: At the peak pressure, via pressure ionization K-shell orbits form the K-MIMS, which is vibrationally hot and encapsulated by a Rydberg-like pseudo-L-Shell structure. Stage IV: The K-MIMS cools down by ionizing (""boiling-off"") a number of pseudo-L-shell electrons and subsequent optical decay by emitting an x-ray photon. The dissociated atoms return their original atoms states and are ready for absorbing the compression energy.MIMS also can be readily produced in laboratory and industrial environments, such as hypervelocity particle impact, laser fusion and z-machine. MIMS can be exploited for highly energy-efficient production of high intensity x-ray beams for a wide range of innovative applications, such as photolithography, x-ray lasers, and inertial fusion.