Biology\Ch 2 Chemistry
... Water is VERY unique. Water is polar. That is, the oxygen atom in water pulls harder on the electrons than the hydrogens do. So, the oxygen “edge” is more negative than the hydrogen portions. This makes water almost magnetic, so it likes to cling to surfaces. This is called adhesion. Because water i ...
... Water is VERY unique. Water is polar. That is, the oxygen atom in water pulls harder on the electrons than the hydrogens do. So, the oxygen “edge” is more negative than the hydrogen portions. This makes water almost magnetic, so it likes to cling to surfaces. This is called adhesion. Because water i ...
South Pasadena • AP Chemistry Name
... h, Planck’s constant, is 6.626 x 10-34 J s c, the speed of light, is 2.998 x 108 m s-1 calculate from these data the ionization energy of hydrogen in kJ/mol. Compare the results of your calculation with the value in your text (Appendix F). ...
... h, Planck’s constant, is 6.626 x 10-34 J s c, the speed of light, is 2.998 x 108 m s-1 calculate from these data the ionization energy of hydrogen in kJ/mol. Compare the results of your calculation with the value in your text (Appendix F). ...
Chemistry Review - pams-hoey
... Atomic Number and Mass • The number of protons in the nucleus determines the atomic number of the element • The mass number is the sum of the protons and neutrons and is used to distinguish one isotope ...
... Atomic Number and Mass • The number of protons in the nucleus determines the atomic number of the element • The mass number is the sum of the protons and neutrons and is used to distinguish one isotope ...
Just a Few Things 2012
... Homogeneous mixtures are called solutions. example: NaCl (aq), air Solid solutions are often between metals alloys Liquid solutions are transparent. ...
... Homogeneous mixtures are called solutions. example: NaCl (aq), air Solid solutions are often between metals alloys Liquid solutions are transparent. ...
WP1
... What happens if the electron emission rate is so low, that only one electron goes thru the slit at once? Will there be a wave-like pattern? Yes. Somehow the single electrons are interfering with themselves! What! How? Does a single electron go through both slits (to cause the interference)? How can ...
... What happens if the electron emission rate is so low, that only one electron goes thru the slit at once? Will there be a wave-like pattern? Yes. Somehow the single electrons are interfering with themselves! What! How? Does a single electron go through both slits (to cause the interference)? How can ...
Parts of Unit 4 and 5Chp 5-6 – Electrons and
... = frequency, in units of hertz (hz, sec-1) = wavelength, in meters ...
... = frequency, in units of hertz (hz, sec-1) = wavelength, in meters ...
Reactions I Can..
... 12. Balance a nuclear equation for both charge and mass. 13. Identify the source of energy in nuclear reactions. 14. Compare and contrast nuclear fusion and nuclear fission 15. Define isotope and identify a set of isotopes when given their mass numbers and atomic numbers. 16. Generalize how the rela ...
... 12. Balance a nuclear equation for both charge and mass. 13. Identify the source of energy in nuclear reactions. 14. Compare and contrast nuclear fusion and nuclear fission 15. Define isotope and identify a set of isotopes when given their mass numbers and atomic numbers. 16. Generalize how the rela ...
Atoms
... 12. Balance a nuclear equation for both charge and mass. 13. Identify the source of energy in nuclear reactions. 14. Compare and contrast nuclear fusion and nuclear fission 15. Define isotope and identify a set of isotopes when given their mass numbers and atomic numbers. 16. Generalize how the rela ...
... 12. Balance a nuclear equation for both charge and mass. 13. Identify the source of energy in nuclear reactions. 14. Compare and contrast nuclear fusion and nuclear fission 15. Define isotope and identify a set of isotopes when given their mass numbers and atomic numbers. 16. Generalize how the rela ...
Schr dinger Equation
... Let us begin by stating that there are certain things which we must simply accept and there is no way to prove them. They are the things that we postulate must be true. They cannot be proven but if they are accepted then what follows bears out in the real world. As such QM offers a tool to predict t ...
... Let us begin by stating that there are certain things which we must simply accept and there is no way to prove them. They are the things that we postulate must be true. They cannot be proven but if they are accepted then what follows bears out in the real world. As such QM offers a tool to predict t ...
AP Chemistry
... 6.3.1 Monochromatic light = light of a single wavelength 6.3.2 Spectrum = when radiation from a source is separated into its different wavelengths 6.3.2.1 Continuous spectrum = rainbow of colors, containing light of all wavelengths 6.3.2.2 Some radiation sources give off light with only a few, speci ...
... 6.3.1 Monochromatic light = light of a single wavelength 6.3.2 Spectrum = when radiation from a source is separated into its different wavelengths 6.3.2.1 Continuous spectrum = rainbow of colors, containing light of all wavelengths 6.3.2.2 Some radiation sources give off light with only a few, speci ...
Bohr`s model of atom- postulates The electron in an atom moves
... a. Also known as orbital angular momentum or subsidiary quantum number b. Identifies subshells and shapes of the orbital c. l can have values, ranging from 0 to n − 1. d. For n = 1, l = 0 [1s subshell] For n = 2, l = 0, 1 [2s, 2p subshell] For n = 3, l = 0, 1, 2 [3s, 3p, 3d subshell] For n = 4, l = ...
... a. Also known as orbital angular momentum or subsidiary quantum number b. Identifies subshells and shapes of the orbital c. l can have values, ranging from 0 to n − 1. d. For n = 1, l = 0 [1s subshell] For n = 2, l = 0, 1 [2s, 2p subshell] For n = 3, l = 0, 1, 2 [3s, 3p, 3d subshell] For n = 4, l = ...
Test Review CBA 2B
... What position has the most kinetic energy? Position X 2. Define potential energy energy due to position, condition, or chemical composition 3. Give an example of potential energy due to a. Position: The higher off the surface the more possible energy b. Condition: The farther you stretch something t ...
... What position has the most kinetic energy? Position X 2. Define potential energy energy due to position, condition, or chemical composition 3. Give an example of potential energy due to a. Position: The higher off the surface the more possible energy b. Condition: The farther you stretch something t ...
Indiana University Physics P301: Modern Physics Review Problems
... sequence for the angular momentum quantum number in spectroscopic notation is {s, p, d, f, g, . . .}.) (b) For the solution for the radial part of the 3s state of hydrogen, R30 (r) = C (27 − 18r/a+2r2 /a2 )e−r/3a , where C and a are real constants (a being the Bohr radius), write down (but do not ev ...
... sequence for the angular momentum quantum number in spectroscopic notation is {s, p, d, f, g, . . .}.) (b) For the solution for the radial part of the 3s state of hydrogen, R30 (r) = C (27 − 18r/a+2r2 /a2 )e−r/3a , where C and a are real constants (a being the Bohr radius), write down (but do not ev ...
Electron Configurations
... So you learned about the Bohr model of an atom as well the electronic configuration of that atom. If you have taken or are taking any sort of an advanced chemistry class, then you probably didn’t have much trouble with these concepts. Otherwise, you may want some extra information on the subject. Mo ...
... So you learned about the Bohr model of an atom as well the electronic configuration of that atom. If you have taken or are taking any sort of an advanced chemistry class, then you probably didn’t have much trouble with these concepts. Otherwise, you may want some extra information on the subject. Mo ...
Balmer Series
... while the Lyman Series involves transitions that start or end with the ground state (n=1) of hydrogen. Because of the details of hydrogen's atomic structure, the Balmer Series is in the visible spectrum and the Lyman Series is in the UV. The Balmer lines are designated by H with a greek subscript in ...
... while the Lyman Series involves transitions that start or end with the ground state (n=1) of hydrogen. Because of the details of hydrogen's atomic structure, the Balmer Series is in the visible spectrum and the Lyman Series is in the UV. The Balmer lines are designated by H with a greek subscript in ...
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.