LOYOLA COLLEGE (AUTONOMOUS), CHENNAI
... State any two postulates of quantum mechanics. Prove that the square of the angular momentum commutes with its components. What is meant by degeneracy of an energy level? What is an orthonormal basis? With an example explain simultaneous eigenfunctions. If A and B are two operators, then show that [ ...
... State any two postulates of quantum mechanics. Prove that the square of the angular momentum commutes with its components. What is meant by degeneracy of an energy level? What is an orthonormal basis? With an example explain simultaneous eigenfunctions. If A and B are two operators, then show that [ ...
Ch1-8 Brown and LeMay Review
... CrO42SO42OH7. Calculate the molar concentration of OH- when 40.0 mL of 0.25 M KOH is added to 60.0 mL of 0.15 M Ba(OH)2 ? Assume the volumes are additive. Heisenberg Uncertainty Principle Hund’s Rule Wave nature of light Pauli Exclusion Principle Shielding effect A) Can be used to predict that a gas ...
... CrO42SO42OH7. Calculate the molar concentration of OH- when 40.0 mL of 0.25 M KOH is added to 60.0 mL of 0.15 M Ba(OH)2 ? Assume the volumes are additive. Heisenberg Uncertainty Principle Hund’s Rule Wave nature of light Pauli Exclusion Principle Shielding effect A) Can be used to predict that a gas ...
Answers
... vertical intercept is a measure of the binding energy – called in this case the work function. d) What is the equation of the line and what is the physical meaning of each term? E = hf -W The E refers to the kinetic energy of the fastest emitted electrons. The horizontal variable is the frequency of ...
... vertical intercept is a measure of the binding energy – called in this case the work function. d) What is the equation of the line and what is the physical meaning of each term? E = hf -W The E refers to the kinetic energy of the fastest emitted electrons. The horizontal variable is the frequency of ...
chapter-27-1-with
... What is the temperature of the Sun (specifically the photosphere of the Sun)? ...
... What is the temperature of the Sun (specifically the photosphere of the Sun)? ...
Chapter 4 - Rothschild Science
... spectrum of discrete lines of different colors (separate energies) is observed rather than a continuous spectrum of ROY G BIV. ...
... spectrum of discrete lines of different colors (separate energies) is observed rather than a continuous spectrum of ROY G BIV. ...
Test #5 Review
... If 22.1 p equals 84 q, how many p are equal to 469 q? 120 p (remember, only two sig figs) ...
... If 22.1 p equals 84 q, how many p are equal to 469 q? 120 p (remember, only two sig figs) ...
Ch. 2: The Chemical Context of Life AP Reading Guide
... This chapter covers the basics that you may have learned in your chemistry class. Whether your teacher goes over this chapter, or assigns it for you do review on your own, the questions that follow should help you focus on the most important points. Concept 2.1 Matter consists of chemical elements i ...
... This chapter covers the basics that you may have learned in your chemistry class. Whether your teacher goes over this chapter, or assigns it for you do review on your own, the questions that follow should help you focus on the most important points. Concept 2.1 Matter consists of chemical elements i ...
Unit 2: Atoms and their Electrons
... in the same period, therefore they all have the same number of shielding electrons and the effective nuclear charge increases based on the number of protons in the nucleus, therefore the atomic radius decreases from left to right across the period. Potassium is larger than sodium because not only do ...
... in the same period, therefore they all have the same number of shielding electrons and the effective nuclear charge increases based on the number of protons in the nucleus, therefore the atomic radius decreases from left to right across the period. Potassium is larger than sodium because not only do ...
Honors Chemistry
... 10. What is meant by an electron having dual wave-particle nature, where were these electrons described as being located, and who suggested this theory? Sometimes light acts like a wave and some other times like a particle. To understand what light is one must take both characteristics into consider ...
... 10. What is meant by an electron having dual wave-particle nature, where were these electrons described as being located, and who suggested this theory? Sometimes light acts like a wave and some other times like a particle. To understand what light is one must take both characteristics into consider ...
Introduction to Chemistry
... To show that light has both wave and particulate properties. To describe how diffraction experiments were used to demonstrate the dual nature of all matter. To show that the line spectrum of hydrogen demonstrates the quanitzed nature of the energy of its electron. To describe the development of the ...
... To show that light has both wave and particulate properties. To describe how diffraction experiments were used to demonstrate the dual nature of all matter. To show that the line spectrum of hydrogen demonstrates the quanitzed nature of the energy of its electron. To describe the development of the ...
General Chemistry - Review for final exam: (Make sure you bring
... d. KClO3 (Decomposition) e. CH4 + O2 (Combustion) 71. In the above reaction, NaCl + F2 NaF + Cl2, F is more or less reactive than Cl? 72. In the activity series of metals are the more reactive metals found on the top or the bottom of the chart? 73. What conditions in the reactants must be pres ...
... d. KClO3 (Decomposition) e. CH4 + O2 (Combustion) 71. In the above reaction, NaCl + F2 NaF + Cl2, F is more or less reactive than Cl? 72. In the activity series of metals are the more reactive metals found on the top or the bottom of the chart? 73. What conditions in the reactants must be pres ...
Honors Chemistry
... particles (photons) nor the wave theory of light is correct if considered alone. Only combined does one get a full and proper understanding. ...
... particles (photons) nor the wave theory of light is correct if considered alone. Only combined does one get a full and proper understanding. ...
Practice problems - Phenix at Vanderbilt
... levels in this nucleus are not precisely the same as though in the Bohr formula since the electrons are not only affected by the Z=2 nucleus, but they are also affected by each other. However, if one of the electrons from a He atom is removed, this positively charged ion (a 42 He nucleus plus only O ...
... levels in this nucleus are not precisely the same as though in the Bohr formula since the electrons are not only affected by the Z=2 nucleus, but they are also affected by each other. However, if one of the electrons from a He atom is removed, this positively charged ion (a 42 He nucleus plus only O ...
CH 115 Fall 2014Worksheet 2 Express the following values in
... This is the simplest version I could find – there’s probably a better one in your book so check it out! A line spectra graph or a Bohr diagram describes energy levels of the electrons present in the atom. Energy level is represented by the n on the right side of the diagram and as we increase n, we ...
... This is the simplest version I could find – there’s probably a better one in your book so check it out! A line spectra graph or a Bohr diagram describes energy levels of the electrons present in the atom. Energy level is represented by the n on the right side of the diagram and as we increase n, we ...
X-ray photoelectron spectroscopy
X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique that measures the elemental composition at the parts per thousand range, empirical formula, chemical state and electronic state of the elements that exist within a material. XPS spectra are obtained by irradiating a material with a beam of X-rays while simultaneously measuring the kinetic energy and number of electrons that escape from the top 0 to 10 nm of the material being analyzed. XPS requires high vacuum (P ~ 10−8 millibar) or ultra-high vacuum (UHV; P < 10−9 millibar) conditions, although a current area of development is ambient-pressure XPS, in which samples are analyzed at pressures of a few tens of millibar.XPS is a surface chemical analysis technique that can be used to analyze the surface chemistry of a material in its as-received state, or after some treatment, for example: fracturing, cutting or scraping in air or UHV to expose the bulk chemistry, ion beam etching to clean off some or all of the surface contamination (with mild ion etching) or to intentionally expose deeper layers of the sample (with more extensive ion etching) in depth-profiling XPS, exposure to heat to study the changes due to heating, exposure to reactive gases or solutions, exposure to ion beam implant, exposure to ultraviolet light.XPS is also known as ESCA (Electron Spectroscopy for Chemical Analysis), an abbreviation introduced by Kai Siegbahn's research group to emphasize the chemical (rather than merely elemental) information that the technique provides.In principle XPS detects all elements. In practice, using typical laboratory-scale X-ray sources, XPS detects all elements with an atomic number (Z) of 3 (lithium) and above. It cannot easily detect hydrogen (Z = 1) or helium (Z = 2).Detection limits for most of the elements (on a modern instrument) are in the parts per thousand range. Detection limits of parts per million (ppm) are possible, but require special conditions: concentration at top surface or very long collection time (overnight).XPS is routinely used to analyze inorganic compounds, metal alloys, semiconductors, polymers, elements, catalysts, glasses, ceramics, paints, papers, inks, woods, plant parts, make-up, teeth, bones, medical implants, bio-materials, viscous oils, glues, ion-modified materials and many others.XPS is less routinely used to analyze the hydrated forms of some of the above materials by freezing the samples in their hydrated state in an ultra pure environment, and allowing or causing multilayers of ice to sublime away prior to analysis. Such hydrated XPS analysis allows hydrated sample structures, which may be different from vacuum-dehydrated sample structures, to be studied in their more relevant as-used hydrated structure. Many bio-materials such as hydrogels are examples of such samples.