![Electrons and “holes”](http://s1.studyres.com/store/data/002365274_1-68d92b61ac3c61c762625ee81640cea0-300x300.png)
Electrons and “holes”
... In a p-type semiconductor, the dopant produces extra vacancies or holes, which likewise increase the conductivity. It is however the behavior of the p-n junction which is the key to the enormous variety of solid-state electronic devices. Semiconductor Current: The current which will flow in an intri ...
... In a p-type semiconductor, the dopant produces extra vacancies or holes, which likewise increase the conductivity. It is however the behavior of the p-n junction which is the key to the enormous variety of solid-state electronic devices. Semiconductor Current: The current which will flow in an intri ...
Investigations of Townsend discharges in neon by mass spectrometry
... up to 400° C. Between the extraction hole and the QMF a grid and aperture lense are placed to obtain optimum entrance conditions for the ions in the QMF. The ions leaving the mass filter are deflected by an electrostatic mirror and collected by a channel electron multiplier. Because of this deflecti ...
... up to 400° C. Between the extraction hole and the QMF a grid and aperture lense are placed to obtain optimum entrance conditions for the ions in the QMF. The ions leaving the mass filter are deflected by an electrostatic mirror and collected by a channel electron multiplier. Because of this deflecti ...
uplift luna ap chemistry
... is similar, except that anions are always made to end in -ate. Coordination compounds, like other ionic compounds, are named with the cation preceding the anion regardless of which (if either) one of them is a complex ion. The rules for naming complex ions or compounds are as follows: As with any ...
... is similar, except that anions are always made to end in -ate. Coordination compounds, like other ionic compounds, are named with the cation preceding the anion regardless of which (if either) one of them is a complex ion. The rules for naming complex ions or compounds are as follows: As with any ...
Oxidation Reactions of Lanthanide Cations with N2O and O2
... The lanthanide cations all have positive affinities for O atoms and are summarized in Table 1. Values for OA(Ln+) in Table 1 are based on values for ∆Hfo(LnO) tabulated in ref 19 and values for ∆Hfo(Ln), ∆Hfo(O), IE(Ln), and IE(LnO) found in ref 20. They range from 88.1 ( 5.9 kcal mol-1 for Yb+ to 2 ...
... The lanthanide cations all have positive affinities for O atoms and are summarized in Table 1. Values for OA(Ln+) in Table 1 are based on values for ∆Hfo(LnO) tabulated in ref 19 and values for ∆Hfo(Ln), ∆Hfo(O), IE(Ln), and IE(LnO) found in ref 20. They range from 88.1 ( 5.9 kcal mol-1 for Yb+ to 2 ...
Higher Chemistry - Mobile Resource
... We discovered that increasing the temperature causes a very marked increase in the rate of a reaction. At first we might think this is because there is an increase in the number of collisions at the higher temperature. However it can be shown that a 10°C rise in temperature hardly increases the numb ...
... We discovered that increasing the temperature causes a very marked increase in the rate of a reaction. At first we might think this is because there is an increase in the number of collisions at the higher temperature. However it can be shown that a 10°C rise in temperature hardly increases the numb ...
2005/6 - SAASTA
... Answer: Wikipedia pH is a measure of the acidity of a solution in terms of activity of hydrogen ions (H+). For dilute solutions, however, it is convenient to substitute the activity of the hydrogen ions with the molarity (mol/L) of the hydrogen ions (however, this is not necessarily accurate at hig ...
... Answer: Wikipedia pH is a measure of the acidity of a solution in terms of activity of hydrogen ions (H+). For dilute solutions, however, it is convenient to substitute the activity of the hydrogen ions with the molarity (mol/L) of the hydrogen ions (however, this is not necessarily accurate at hig ...
(1–1.5 kV) nitrogen-ion bombardment on sharply pointed tips
... simple low-energy irradiation treatment. This is a useful technique for the in situ sharpening or resharpening of tips. Furthermore, APFIM results demonstrate that '50% of the implanted nitrogen ions react with the Mo atoms that are in solid solution. And we demonstrate, via APFIM, that molybdenum n ...
... simple low-energy irradiation treatment. This is a useful technique for the in situ sharpening or resharpening of tips. Furthermore, APFIM results demonstrate that '50% of the implanted nitrogen ions react with the Mo atoms that are in solid solution. And we demonstrate, via APFIM, that molybdenum n ...
Chemical Bonding - Mrs Gillum`s Web Page!
... Seashells, table salt, and plaster of Paris, shown in Figure 5, have much in common. They are all hard, brittle solids at room temperature, they all have high melting points, and they all contain ionic bonds. An ionic bond is the force of attraction between oppositely charged ions. Ions are charged ...
... Seashells, table salt, and plaster of Paris, shown in Figure 5, have much in common. They are all hard, brittle solids at room temperature, they all have high melting points, and they all contain ionic bonds. An ionic bond is the force of attraction between oppositely charged ions. Ions are charged ...
File
... Award [3] for correct final answer. Award [2] for (+)540. If old Data Booklet is used accept answer: –535 (kJ mol–1) or award [2] for (+)535. ...
... Award [3] for correct final answer. Award [2] for (+)540. If old Data Booklet is used accept answer: –535 (kJ mol–1) or award [2] for (+)535. ...
Spring 2008
... Georgia Institute of Technology | CHEM 1310 | Spring Semester 2008 | Dr. Charlie Cox | Test 1 answer C: First, you need relative numbers of moles. Assume you have 24.8 g of C (12g/mol) to get 2 moles C. Assume 2 g of H (1g/mol) to get 1 moles of H, etc. Then use the molecular wt to get the ...
... Georgia Institute of Technology | CHEM 1310 | Spring Semester 2008 | Dr. Charlie Cox | Test 1 answer C: First, you need relative numbers of moles. Assume you have 24.8 g of C (12g/mol) to get 2 moles C. Assume 2 g of H (1g/mol) to get 1 moles of H, etc. Then use the molecular wt to get the ...
The Atomic Theory Chem 111
... He found that He has 4x the weight of H but is next in line on the Periodic Table. Therefore the electron is 1/10,000 of the weight of a proton. Chadwick: He bombarded Beryllium with alpha particles and got a mystery ray off of the surface. It was like gamma rays but was much heavier. The weight was ...
... He found that He has 4x the weight of H but is next in line on the Periodic Table. Therefore the electron is 1/10,000 of the weight of a proton. Chadwick: He bombarded Beryllium with alpha particles and got a mystery ray off of the surface. It was like gamma rays but was much heavier. The weight was ...
Document
... hydrogen bonded networks formed by amino acids in co-crystals or salts, precursors of the MBio-F's. During this research we came across an interesting species: L-histidinium hydrogen oxalate (1), first characterized at ambient conditions by Prabu et al.10 1 has attracted our attention because of its ...
... hydrogen bonded networks formed by amino acids in co-crystals or salts, precursors of the MBio-F's. During this research we came across an interesting species: L-histidinium hydrogen oxalate (1), first characterized at ambient conditions by Prabu et al.10 1 has attracted our attention because of its ...
Ligand field density functional theory calculation of the 4f²→ 4f¹5d¹
... Cs -sites) were taken from the work of Schiffbauer et al.,33 where the experimental bond lengths between the F ion and the Y3+, K+ and Cs+ were 2.156 Å, 2.573 Å and 3.350 Å, respectively. When the Pr3+ ion is doped into these three sites, Schiffbauer et al.33 calculated the bond lengths between the F ...
... Cs -sites) were taken from the work of Schiffbauer et al.,33 where the experimental bond lengths between the F ion and the Y3+, K+ and Cs+ were 2.156 Å, 2.573 Å and 3.350 Å, respectively. When the Pr3+ ion is doped into these three sites, Schiffbauer et al.33 calculated the bond lengths between the F ...
Slide 1
... Dalton proposed a theory of matter based on it having ultimate, indivisible particles to explain these laws Each element is composed of tiny, indestructible particles called atoms All atoms of a given element have the same mass and other properties that distinguish them from atoms of other elements ...
... Dalton proposed a theory of matter based on it having ultimate, indivisible particles to explain these laws Each element is composed of tiny, indestructible particles called atoms All atoms of a given element have the same mass and other properties that distinguish them from atoms of other elements ...
CHAPTER 23 THE TRANSITION ELEMENTS AND THEIR
... a) The cation is tetramminezinc ion. The tetraammine indicate four NH3 ligands. Zinc has an oxidation state of +2, so the charge on the cation is +2. The anion is SO42-. Only one sulfate is needed to make a neutral salt. The formula of the compound is [Zn(NH3)4]SO4. b) The cation is pentaamminechlor ...
... a) The cation is tetramminezinc ion. The tetraammine indicate four NH3 ligands. Zinc has an oxidation state of +2, so the charge on the cation is +2. The anion is SO42-. Only one sulfate is needed to make a neutral salt. The formula of the compound is [Zn(NH3)4]SO4. b) The cation is pentaamminechlor ...
The Complete Notes - Joliet Junior College
... or EXP to enter the numbers in SCI notation. What happens if you try the same math using other keys, such as 10x or ^ ? ...
... or EXP to enter the numbers in SCI notation. What happens if you try the same math using other keys, such as 10x or ^ ? ...
Metastable inner-shell molecular state
![](https://commons.wikimedia.org/wiki/Special:FilePath/MIMS_Illustration_-_Final.jpg?width=300)
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.