1st Semester Final Exam Review Guide
... What is the difference between a physical and chemical change? Give an example of each. Elements in the same group on the periodic table have similar _______________. A reaction is exothermic when it ______________ _______. It is endothermic when it ______________ __________. Perform the following c ...
... What is the difference between a physical and chemical change? Give an example of each. Elements in the same group on the periodic table have similar _______________. A reaction is exothermic when it ______________ _______. It is endothermic when it ______________ __________. Perform the following c ...
Review Notes - Biochemistry
... The goal of all atoms is to have a _STABLE_ outer energy level. The goal leads to bonding of atoms. 2 types of bonding: 1. Ionic Bonding: When _1_ or more electrons are _TRANSFERRED_ from one atom to another. Ion: an atom with a_CHARGE_. When an electron is gained it will be _NEGATIVE_charged ...
... The goal of all atoms is to have a _STABLE_ outer energy level. The goal leads to bonding of atoms. 2 types of bonding: 1. Ionic Bonding: When _1_ or more electrons are _TRANSFERRED_ from one atom to another. Ion: an atom with a_CHARGE_. When an electron is gained it will be _NEGATIVE_charged ...
Chemistry I Unit Review: The Atom Text Chapters 2 and 7 1. The
... Determine the number of valence electrons and draw the dot diagram for the following atoms: ...
... Determine the number of valence electrons and draw the dot diagram for the following atoms: ...
Quantum Physics 2 - More About
... Plot the results from the vacuum photocell to determine Planck’s constant and the work function. ...
... Plot the results from the vacuum photocell to determine Planck’s constant and the work function. ...
Chapter 2 Learning Objectives
... 3. Understand that the electrons of an atom behave as waves, resulting in quantum numbers 4. Know all four quantum numbers (n, l, ml, ms), and the dependency rules between them 5. Be able to use the Balmer-Rydberg equation to relate orbital energy levels to the properties of the ...
... 3. Understand that the electrons of an atom behave as waves, resulting in quantum numbers 4. Know all four quantum numbers (n, l, ml, ms), and the dependency rules between them 5. Be able to use the Balmer-Rydberg equation to relate orbital energy levels to the properties of the ...
Extended Questions- The Answers
... a material receives a continuous spectrum of light, some of the frequencies of light (and the energies E=hf) may correspond to energy levels within the atom. If an electron absorbs a photon of a particular energy it makes an upward transition to a higher energy level. The absence of this photon woul ...
... a material receives a continuous spectrum of light, some of the frequencies of light (and the energies E=hf) may correspond to energy levels within the atom. If an electron absorbs a photon of a particular energy it makes an upward transition to a higher energy level. The absence of this photon woul ...
Test 1 Guide
... 14) The capacity to do work is called kinetic potential. 15) There are 20 mLs in 0.2 L. 16) Saltwater (after it is adequately filtered) is a good example of homogeneous mixture. 17) There are 3 significant figures in 0.00300 mLs. Chapter 2: 1) Neutrons have almost no mass (in amu) and no charge. 2) ...
... 14) The capacity to do work is called kinetic potential. 15) There are 20 mLs in 0.2 L. 16) Saltwater (after it is adequately filtered) is a good example of homogeneous mixture. 17) There are 3 significant figures in 0.00300 mLs. Chapter 2: 1) Neutrons have almost no mass (in amu) and no charge. 2) ...
107 chem Assement Q
... c. Avogadro’s number d. 4.184 2. The energy of a photon of electromagnetic energy divided by its frequency equals: a. c, the speed of light b. h, Planck’s constant c. Avogadro’s number d. 4.184 3. Light that contains colors of all wavelengths is called: a. b. c. d. ...
... c. Avogadro’s number d. 4.184 2. The energy of a photon of electromagnetic energy divided by its frequency equals: a. c, the speed of light b. h, Planck’s constant c. Avogadro’s number d. 4.184 3. Light that contains colors of all wavelengths is called: a. b. c. d. ...
AP Chemistry Chapter 6 Outline for Concepts to Know 6.1 Wave
... order of categories of electromagnetic radiation order and approximate range of visible radiation 4 – 8(x10-7) m 6.2 Quantized Energy and Photons Concept of smallest unit of light energy as photon – having properties of both particles and waves Quantum as smallest possible packets or quantit ...
... order of categories of electromagnetic radiation order and approximate range of visible radiation 4 – 8(x10-7) m 6.2 Quantized Energy and Photons Concept of smallest unit of light energy as photon – having properties of both particles and waves Quantum as smallest possible packets or quantit ...
Physics 535 lectures notes: 1 * Sep 4th 2007
... 5V approach the barrier. What percentage of electrons will tunnel through the barrier? 3) Consider a infinite 3D box potential with L2=2L1 and L3=4L1. What are the quantum numbers of the lowest degenerate energy levels? List, ordered by energy, the quantum numbers and energies of all the levels up t ...
... 5V approach the barrier. What percentage of electrons will tunnel through the barrier? 3) Consider a infinite 3D box potential with L2=2L1 and L3=4L1. What are the quantum numbers of the lowest degenerate energy levels? List, ordered by energy, the quantum numbers and energies of all the levels up t ...
Document
... If an electron falls from the third orbit to the first, how much energy does it lose? ...
... If an electron falls from the third orbit to the first, how much energy does it lose? ...
DOC - 嘉義大學
... (c) What speed (in units of c) is the neutron moving in this case? (d) What is the neutron’s momentum in unit of MeV/c? 2. Suppose that light of total intensity 1.0 W/cm2 falls on a clean zinc (Zn) sample which the area is 1.01.0 cm2. Assume that the Zn sample reflects 95% of the light (absorbs 5% ...
... (c) What speed (in units of c) is the neutron moving in this case? (d) What is the neutron’s momentum in unit of MeV/c? 2. Suppose that light of total intensity 1.0 W/cm2 falls on a clean zinc (Zn) sample which the area is 1.01.0 cm2. Assume that the Zn sample reflects 95% of the light (absorbs 5% ...
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.