Chapter 6 lecture 1
... Regardless of intensity, if the frequency of the radiation is not above a certain threshold, an electron will not be emitted by the metal This phenomenon cannot be explained using the ‘wave’ notion of radiation Einstein: assumes that radiation isn’t a continuous wave, but exists as particles, or pho ...
... Regardless of intensity, if the frequency of the radiation is not above a certain threshold, an electron will not be emitted by the metal This phenomenon cannot be explained using the ‘wave’ notion of radiation Einstein: assumes that radiation isn’t a continuous wave, but exists as particles, or pho ...
7 Problems Chapter 7: Coulomb Blockade and the Single Elec! tron
... conductors associated with di¤erent circuits (i.e., circuits that should operate independently from one another), this is called parasitic capacitance, and, generally, C / 1=d, where d is some measure of the distance between the conductors. For two independent circuits d is often fairly large, and t ...
... conductors associated with di¤erent circuits (i.e., circuits that should operate independently from one another), this is called parasitic capacitance, and, generally, C / 1=d, where d is some measure of the distance between the conductors. For two independent circuits d is often fairly large, and t ...
chapter 1 - Revsworld
... The combustion of 3.42 g of a compound known to contain only nitrogen and hydrogen was burned in oxygen. The result was the formation of 9.82 g of NO2 and 3.85 g of water. Determine the empirical formula of this compound. SHOW ALL WORK (a) (b) (c) (d) (e) ...
... The combustion of 3.42 g of a compound known to contain only nitrogen and hydrogen was burned in oxygen. The result was the formation of 9.82 g of NO2 and 3.85 g of water. Determine the empirical formula of this compound. SHOW ALL WORK (a) (b) (c) (d) (e) ...
Chapter 2 - Atoms, Molecules, and Ions
... A. The composition of an element is always the same but the composition of a compound may change. B. An element contains atoms but a compound contains molecules. C. Elements are more reactive than compounds. D. Compounds can be broken down further but elements cannot. A 96-4. How many hydrogen atoms ...
... A. The composition of an element is always the same but the composition of a compound may change. B. An element contains atoms but a compound contains molecules. C. Elements are more reactive than compounds. D. Compounds can be broken down further but elements cannot. A 96-4. How many hydrogen atoms ...
Ch 7 Lecture Notes
... How many photons are in 4.00 x 10-17 J of energy produced from orange light with a wavelength of 600. nm? ...
... How many photons are in 4.00 x 10-17 J of energy produced from orange light with a wavelength of 600. nm? ...
POWERPOINT JEOPARDY
... What is an “orbital” (in the Quantum Mechanical Model)? How is it different than an “orbit” (in the Bohr Model)? How does the Bohr Model of the atom differ from the Quantum Mechanical Model? List at least three ways. ...
... What is an “orbital” (in the Quantum Mechanical Model)? How is it different than an “orbit” (in the Bohr Model)? How does the Bohr Model of the atom differ from the Quantum Mechanical Model? List at least three ways. ...
energy-and-entropy-introduction
... The total number of product molecules is greater than the total number of reactant molecules There is energy expended to maintain the living structures in all living things. This allows order to be established even when there is disorder (entropy). Spontaneous change is a change that will, once begu ...
... The total number of product molecules is greater than the total number of reactant molecules There is energy expended to maintain the living structures in all living things. This allows order to be established even when there is disorder (entropy). Spontaneous change is a change that will, once begu ...
Lecture. Photoelectric Effect
... J.J. Thomson (Nobel 1906) and P. Lenard (Nobel 1905) determined the ration e/m for the particles emitted by the body under illumination – the same as for electrons. The effect remained unexplained until 1905 when Albert Einstein postulated the existence of quanta of light -- photons -- which, when a ...
... J.J. Thomson (Nobel 1906) and P. Lenard (Nobel 1905) determined the ration e/m for the particles emitted by the body under illumination – the same as for electrons. The effect remained unexplained until 1905 when Albert Einstein postulated the existence of quanta of light -- photons -- which, when a ...
o Positive charge • Electrons
... Atomic mass (u) = average mass of atoms of isotopes as the occur naturally To calculate: o Divide percentages by 100 to find natural abundances o Atomic mass = (abundance 1 x mass 1) + (abundance 2 x mass 2) ...
... Atomic mass (u) = average mass of atoms of isotopes as the occur naturally To calculate: o Divide percentages by 100 to find natural abundances o Atomic mass = (abundance 1 x mass 1) + (abundance 2 x mass 2) ...
Super-Shell Structure in Two-Component Dilute Fermionic Gases
... The diameter orbit, which has no angular momentum , comes from the lower integration limit in l (scaled angular momentum). The circle orbit, which has maximal angular momentum, comes from the upper integration limit in l ...
... The diameter orbit, which has no angular momentum , comes from the lower integration limit in l (scaled angular momentum). The circle orbit, which has maximal angular momentum, comes from the upper integration limit in l ...
amu (atomic mass unit): a unit used to express very small masses
... Niels Bohr's ideas of electron distribution within the atom are useful concepts and laid the foundation for much of the later progress in understanding atomic structure. But, as is the case with many theories, Bohr's assumptions have had to be modified. Difficulty arose in applying the theory to at ...
... Niels Bohr's ideas of electron distribution within the atom are useful concepts and laid the foundation for much of the later progress in understanding atomic structure. But, as is the case with many theories, Bohr's assumptions have had to be modified. Difficulty arose in applying the theory to at ...
Unit - eBoard
... Equation relating Energy, Frequency, Planck’s Constant E = h x ν Explanation of Photoelectric Effect by Albert Einstein Flame Tests Line-Emission Spectrum Spectroscopy Lab: Flame Tests & Line-Emission Spectroscopy Ground State vs. Excited State Movement of atoms between energy levels Bohr Model Orbi ...
... Equation relating Energy, Frequency, Planck’s Constant E = h x ν Explanation of Photoelectric Effect by Albert Einstein Flame Tests Line-Emission Spectrum Spectroscopy Lab: Flame Tests & Line-Emission Spectroscopy Ground State vs. Excited State Movement of atoms between energy levels Bohr Model Orbi ...
Exercises #1 - Berkeley City College
... 2. the angular momentum quantum number l describes the energy sublevels or subshell and the shape of the orbital within each subshell. Within each principal energy level or principal electronic shell, l is allowed values from 0 to (n – 1). All subshells with l = 0 and the orbitals within are designa ...
... 2. the angular momentum quantum number l describes the energy sublevels or subshell and the shape of the orbital within each subshell. Within each principal energy level or principal electronic shell, l is allowed values from 0 to (n – 1). All subshells with l = 0 and the orbitals within are designa ...
3 - Zheng Research Group
... the chemical that determines how far the reaction will go before the chemical in question gets "used up", ...
... the chemical that determines how far the reaction will go before the chemical in question gets "used up", ...
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.