CHEM_1305_Practice_Exam_2
... 2) What is the general term that refers to either visible or invisible radiant energy? A) continuous spectrum ...
... 2) What is the general term that refers to either visible or invisible radiant energy? A) continuous spectrum ...
Test - Chemical Bonding- Practice Test
... d. to increase their atomic numbers ____ 66) Which of the following is not one of the seven diatomic elements? a. O b. Cl c.He2 d. N ____ 67) What type of ions have names ending in -ide? a. only monatomic cations b. only monatomic anions ...
... d. to increase their atomic numbers ____ 66) Which of the following is not one of the seven diatomic elements? a. O b. Cl c.He2 d. N ____ 67) What type of ions have names ending in -ide? a. only monatomic cations b. only monatomic anions ...
Chemistry Lesson Plans #12
... different orientations in space (x, y &z) o d orbitals are more like two sets of dumbbells at right angles to each other o f orbitals are too complex to visualize The p and d orbitals taper as they approach the nucleus, indicating areas where electrons have a low probability of existing. Where these ...
... different orientations in space (x, y &z) o d orbitals are more like two sets of dumbbells at right angles to each other o f orbitals are too complex to visualize The p and d orbitals taper as they approach the nucleus, indicating areas where electrons have a low probability of existing. Where these ...
Atomic Emission Spectra – Copy
... 1. Hydrogen: which emits 4 colors of light that's in the visible light range. Note that other frequencies, such as UV light might be emitted, but we can't see them. 2. Helium: It has 2 electrons and we see 7 colors. 3. Mercury: spectra shows 8 colors. Mercury also produces a lot of UV light which in ...
... 1. Hydrogen: which emits 4 colors of light that's in the visible light range. Note that other frequencies, such as UV light might be emitted, but we can't see them. 2. Helium: It has 2 electrons and we see 7 colors. 3. Mercury: spectra shows 8 colors. Mercury also produces a lot of UV light which in ...
Quantization of Charge, Light, and Energy
... total amount of radiation emitted by blackbody at all wavelengths and found it varied with absolute temperature. It was latter explained through a theoretical derivation by Boltzman, so the result became known as the StefanBoltzman radiation Law: The total power radiated increases with the tempera ...
... total amount of radiation emitted by blackbody at all wavelengths and found it varied with absolute temperature. It was latter explained through a theoretical derivation by Boltzman, so the result became known as the StefanBoltzman radiation Law: The total power radiated increases with the tempera ...
Revision sheet and answer1
... 5) Subsidiary quantum number defines the ………………………. in an atom which are assigned by the symbols ………………… 6) The ………… is spherical symmetrical in shape , while p orbital has ………… shape. 7) The element with electronic configuration 1s2 , 2s2 , 2p6 , 3s1 is present in the ……… group and the ………. period ...
... 5) Subsidiary quantum number defines the ………………………. in an atom which are assigned by the symbols ………………… 6) The ………… is spherical symmetrical in shape , while p orbital has ………… shape. 7) The element with electronic configuration 1s2 , 2s2 , 2p6 , 3s1 is present in the ……… group and the ………. period ...
Lecture 8 1 Schrodinger equation (continued)
... As is the case in most QM problems, we must find the Hamiltonian Ĥ. Ĥ in this case is the energy operator for an electron in an atom. To know this then we must make some assumptions about how electrons behave in an atom. Let’s assume that atoms are very tiny (≈ 10−10 meter) 1-D boxes with very har ...
... As is the case in most QM problems, we must find the Hamiltonian Ĥ. Ĥ in this case is the energy operator for an electron in an atom. To know this then we must make some assumptions about how electrons behave in an atom. Let’s assume that atoms are very tiny (≈ 10−10 meter) 1-D boxes with very har ...
2. Covalent network
... Constants from previous 3 laws (k,b,a) are combined to make a universal constant R. R=.0821 (L*atm)/(mol*k) It can be used to solve for pressure, number of moles, volume, or temberature when all other variables are held constant. At STP (0C and 1atm), the molar volume of an ideal gas is 22.42 L. (C ...
... Constants from previous 3 laws (k,b,a) are combined to make a universal constant R. R=.0821 (L*atm)/(mol*k) It can be used to solve for pressure, number of moles, volume, or temberature when all other variables are held constant. At STP (0C and 1atm), the molar volume of an ideal gas is 22.42 L. (C ...
Chemistry I - Net Start Class
... 6. In a proposal for a $1 million grant, a claim is made that a method will be developed to make 20 grams of gold from 10 grams of gold and no other ingredients. Is this possible? 7. In a patent application for a machine, 20 joules of energy is used to produce 35 joules of energy. Is this possible? ...
... 6. In a proposal for a $1 million grant, a claim is made that a method will be developed to make 20 grams of gold from 10 grams of gold and no other ingredients. Is this possible? 7. In a patent application for a machine, 20 joules of energy is used to produce 35 joules of energy. Is this possible? ...
Intermolecular Forces, Bonding and Atomic Theory
... Draw the complete structural formula for an isomer of the molecule you drew in part a. i. ...
... Draw the complete structural formula for an isomer of the molecule you drew in part a. i. ...
Forces between atoms and molecules
... Repulsion between electronic clouds at short distance: ~1/r12. ...
... Repulsion between electronic clouds at short distance: ~1/r12. ...
Chapter 7 The Quantum-Mechanical Model of the Atom
... - each value of l is called by a particular letter that designates the shape of the orbital i.) if l=0, called s orbitals and are spherical. ii.) if l=1, called p orbitals and are like two balloons tied at the knots (dumbbell) iii.) if l=2, called d orbitals and are mainly like four balloons tied at ...
... - each value of l is called by a particular letter that designates the shape of the orbital i.) if l=0, called s orbitals and are spherical. ii.) if l=1, called p orbitals and are like two balloons tied at the knots (dumbbell) iii.) if l=2, called d orbitals and are mainly like four balloons tied at ...
Year 11 Chemistry Balancing Equations
... If an element has two electrons in its outer shell, is it a metal or non-metal? Explain your answer ...
... If an element has two electrons in its outer shell, is it a metal or non-metal? Explain your answer ...
lesson 5: De Broglie Waves / matter waves
... How do X-rays act like particles? – Compton effect. How do x-ray act like waves? X-ray diffraction of crystals. (explain). … the spacing of the atoms is about the same as the wavelength of the x-rays. Do radiowaves act like particles? Hard to see this. The energy is so small. (Energy levels close en ...
... How do X-rays act like particles? – Compton effect. How do x-ray act like waves? X-ray diffraction of crystals. (explain). … the spacing of the atoms is about the same as the wavelength of the x-rays. Do radiowaves act like particles? Hard to see this. The energy is so small. (Energy levels close en ...
Preparatory School to the Winter Collegue on Optics: Optical
... L = path length (in cm) εmax is the maximum absorption coefficient, and is an indication of the intensity of a transition. ...
... L = path length (in cm) εmax is the maximum absorption coefficient, and is an indication of the intensity of a transition. ...
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.