Physics116_L31
... J. J. Thomson (1897) identifies electron: very light, negative charge E. Rutherford (1911) bounces “alpha rays” off gold atoms • We now know: α = nucleus of helium: 2 protons + 2 neutrons • “Scattering experiment” = model for modern particle physics – Size of atoms was approximately known from chemi ...
... J. J. Thomson (1897) identifies electron: very light, negative charge E. Rutherford (1911) bounces “alpha rays” off gold atoms • We now know: α = nucleus of helium: 2 protons + 2 neutrons • “Scattering experiment” = model for modern particle physics – Size of atoms was approximately known from chemi ...
CHM 111: General Physical Chemistry 3 Units
... Historical development of the atom: definition of atoms, Daltons atomic theory, relative atomic masses. Fundamental particles of the atom and atomic structure. Modern electronic theory of atoms; electronic configuration of the elements. Periodicity of the elements. Radioactivity: Stoichiometry: mole ...
... Historical development of the atom: definition of atoms, Daltons atomic theory, relative atomic masses. Fundamental particles of the atom and atomic structure. Modern electronic theory of atoms; electronic configuration of the elements. Periodicity of the elements. Radioactivity: Stoichiometry: mole ...
Structure of atoms and solids
... being negatively charged are bound to the positively charged nucleus. Typical radii for atoms are about 10-10 m. The number of protons within a nucleus determines the element. For example, carbon: 12 protons and uranium: 92 protons. The electrons are not like planets orbiting the Sun. In quantum phy ...
... being negatively charged are bound to the positively charged nucleus. Typical radii for atoms are about 10-10 m. The number of protons within a nucleus determines the element. For example, carbon: 12 protons and uranium: 92 protons. The electrons are not like planets orbiting the Sun. In quantum phy ...
Class 27: The Bohr model for the atom
... De Broglie relation It is Bohr’s postulate (d) that lead de Brogle to formulate his relation between momentum and wavelength. If the electron in the hydrogen atom is to be represented by a wave, then the circumference of the orbit must be an integer number of wavelengths, i.e. ...
... De Broglie relation It is Bohr’s postulate (d) that lead de Brogle to formulate his relation between momentum and wavelength. If the electron in the hydrogen atom is to be represented by a wave, then the circumference of the orbit must be an integer number of wavelengths, i.e. ...
lect19-20
... energies E+total and E-total are also different. For (y1+y2) it is more likely to find the electron between the protons, which reduces the repulsion and hence a lower energy solution results, ie. to take the electron from the state described by (y1+y2) and take it to infinite distance costs energy. ...
... energies E+total and E-total are also different. For (y1+y2) it is more likely to find the electron between the protons, which reduces the repulsion and hence a lower energy solution results, ie. to take the electron from the state described by (y1+y2) and take it to infinite distance costs energy. ...
Chapter 2 (Lecture 2-3) Old Quantum Theory The Postulates of Bohr
... much equally distributed throughout the atom, you would expect a certain amount of deflection, but small. Instead, a much o greater amount of deflection was observed. In fact, some of the alpha particles were deflected back 180 , back to the direction from which they came. This could only happen if ...
... much equally distributed throughout the atom, you would expect a certain amount of deflection, but small. Instead, a much o greater amount of deflection was observed. In fact, some of the alpha particles were deflected back 180 , back to the direction from which they came. This could only happen if ...
Exam 1 Topics to Review (McMurry Chpts 1
... 8. Homogeneous or heterogeneous mixture?: a) salsa b) gasoline 9. Is H2 an element or a compound? An atom? A molecule? 10. What is the volume of liquid in this graduated cylinder? ...
... 8. Homogeneous or heterogeneous mixture?: a) salsa b) gasoline 9. Is H2 an element or a compound? An atom? A molecule? 10. What is the volume of liquid in this graduated cylinder? ...
Chapter Summary
... Finally, the spin angular momentum can take on one of only two values, conventionally referred to as “spin up” and “spin down.” The spin angular momentum is characterized by the spin quantum number, which can take on values of +1/2 or –1/2. Understanding the periodic table of elements One key to und ...
... Finally, the spin angular momentum can take on one of only two values, conventionally referred to as “spin up” and “spin down.” The spin angular momentum is characterized by the spin quantum number, which can take on values of +1/2 or –1/2. Understanding the periodic table of elements One key to und ...
BCIT Fall 2012 Chem 3615 Exam #2
... The greater the width of the barrier, the lower the probability the particle will tunnel through the barrier. For constant particle energy, the greater the mass of the particle, the further into the barrier the particle will tunnel. The energy of the particle after it has emerged from the other ...
... The greater the width of the barrier, the lower the probability the particle will tunnel through the barrier. For constant particle energy, the greater the mass of the particle, the further into the barrier the particle will tunnel. The energy of the particle after it has emerged from the other ...
Physics in Ultracold atoms
... World of zero temperature --- introduction to systems of ultracold atoms Daw-Wei Wang National Tsing-Hua University ...
... World of zero temperature --- introduction to systems of ultracold atoms Daw-Wei Wang National Tsing-Hua University ...
Structure of the Atom - Dr. Vernon-
... thought to be continuous Max Planck, in 1900, proposed that energy is only available in discrete packets, or quanta (singular is quantum); the size of the quantum is related to the frequency of the radiation by a simple equation Bohr Model of the Atom (1913) Bohr applied Planck’s idea of quantiz ...
... thought to be continuous Max Planck, in 1900, proposed that energy is only available in discrete packets, or quanta (singular is quantum); the size of the quantum is related to the frequency of the radiation by a simple equation Bohr Model of the Atom (1913) Bohr applied Planck’s idea of quantiz ...
Honors Chemistry Exam Review Questions
... 52. Three isotopes of oxygen occur in nature: oxygen-16, oxygen-17, and oxygen-18. If the atomic mass of oxygen is 15.994, which of the three isotopes, if any, is the most abundant? A oxygen-16 B oxygen-17 ...
... 52. Three isotopes of oxygen occur in nature: oxygen-16, oxygen-17, and oxygen-18. If the atomic mass of oxygen is 15.994, which of the three isotopes, if any, is the most abundant? A oxygen-16 B oxygen-17 ...
Chapter 4 The Structure of Matter
... • 2. The same for H2O and H2O2 (hydrogen peroxide) • 3. Compounds are always made up of the same elements in the same proportion. • 4. The formula can tell us what atoms a compound is made of but does not reveal how they are connected. ...
... • 2. The same for H2O and H2O2 (hydrogen peroxide) • 3. Compounds are always made up of the same elements in the same proportion. • 4. The formula can tell us what atoms a compound is made of but does not reveal how they are connected. ...
Need for Development of Quantum Mechanics
... Calculate de-Broglie wavelength of a proton moving with 1/10th velocity of light. The electron in hydrogen atom may be thought of as confined to a radius of 5x10-11m.Calculate the minimum uncertainty in the momentum of the electron. Also calculate the minimum kinetic energy of the electron. A radar ...
... Calculate de-Broglie wavelength of a proton moving with 1/10th velocity of light. The electron in hydrogen atom may be thought of as confined to a radius of 5x10-11m.Calculate the minimum uncertainty in the momentum of the electron. Also calculate the minimum kinetic energy of the electron. A radar ...
File
... electron occupy an "s" or spherical orbital. The exponent "2" refers to the total number of electrons in that orbital or sub-shell. In this case, we know that there are two electrons in the spherical orbital at the first energy level. I. Principle Quantum Number (n) and Sublevels The number of sub ...
... electron occupy an "s" or spherical orbital. The exponent "2" refers to the total number of electrons in that orbital or sub-shell. In this case, we know that there are two electrons in the spherical orbital at the first energy level. I. Principle Quantum Number (n) and Sublevels The number of sub ...
國立嘉義大學95學年度
... 2NO(g) + Br (g) . After equilibrium was reached, the volume was increased to 2.0 liters, while the temperature was 44. 2NOBr(g) ...
... 2NO(g) + Br (g) . After equilibrium was reached, the volume was increased to 2.0 liters, while the temperature was 44. 2NOBr(g) ...
High School Physical Science Glossary
... be rearranged or transferred; thus the amount of energy and matter is constant in the universe liquid- state of matter having a definite volume, but not a definite shape longitudinal/compression waves- waves that have vibrations along or parallel to their direction of travel magnetic field- region o ...
... be rearranged or transferred; thus the amount of energy and matter is constant in the universe liquid- state of matter having a definite volume, but not a definite shape longitudinal/compression waves- waves that have vibrations along or parallel to their direction of travel magnetic field- region o ...
chapter 7 quiz
... 10._T__The number of protons and neutrons in the nucleus L) cathode of an atom. M) electron cloud 11._Y__Discovered radioactivity. N) Darth Vader 12._C__Discovered three types of radiation. O) chemical symbol 13._J__The charge on an “beta” particle. P) 0 14._A__The charge on an “alpha” particle. Q) ...
... 10._T__The number of protons and neutrons in the nucleus L) cathode of an atom. M) electron cloud 11._Y__Discovered radioactivity. N) Darth Vader 12._C__Discovered three types of radiation. O) chemical symbol 13._J__The charge on an “beta” particle. P) 0 14._A__The charge on an “alpha” particle. Q) ...
投影片 - 中正大學化生系
... chemical properties; as is apparent among other series in that of Li, Be, B, C, N, O, and F. 4. The magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a compound body. 5. We must expect the discovery of many yet u ...
... chemical properties; as is apparent among other series in that of Li, Be, B, C, N, O, and F. 4. The magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a compound body. 5. We must expect the discovery of many yet u ...
Chapter 2 - Las Positas College
... have to drop all the way back down to its lowest state if it jumped more than one energy state; if it drops down to an intermediate energy state then the energy of the emitted photon is less than the energy of the colliding electron that boosted up the orbital electron. In this case ∆Eelec > Ephoton ...
... have to drop all the way back down to its lowest state if it jumped more than one energy state; if it drops down to an intermediate energy state then the energy of the emitted photon is less than the energy of the colliding electron that boosted up the orbital electron. In this case ∆Eelec > Ephoton ...
The Photoelectric Effect, work function
... implications? Electrons must be leaving the plate and going into the air/vacuum. These electrons will be called photoelectrons. 2. Light of a lower frequency (e.g. red light) has no effect.(recall: lower frequency = lower energy) 3. The minimum frequency of light necessary to produce photoelectro ...
... implications? Electrons must be leaving the plate and going into the air/vacuum. These electrons will be called photoelectrons. 2. Light of a lower frequency (e.g. red light) has no effect.(recall: lower frequency = lower energy) 3. The minimum frequency of light necessary to produce photoelectro ...
Rutherford backscattering spectrometry
Rutherford backscattering spectrometry (RBS) is an analytical technique used in materials science. Sometimes referred to as high-energy ion scattering (HEIS) spectrometry, RBS is used to determine the structure and composition of materials by measuring the backscattering of a beam of high energy ions (typically protons or alpha particles) impinging on a sample.