REVISION CLASS SHEET - SEM - 2 CHEM
... 52. How can you say that electron is a universal constituent of all atoms ? 53. Give experiments to show that (i) Cathode rays carry negative charge (ii) Cathode rays consist of material particles. 54. How was proton discovered ? 55. How can you say that nucleus is small in size but heavy in mass ? ...
... 52. How can you say that electron is a universal constituent of all atoms ? 53. Give experiments to show that (i) Cathode rays carry negative charge (ii) Cathode rays consist of material particles. 54. How was proton discovered ? 55. How can you say that nucleus is small in size but heavy in mass ? ...
Boltzmann/Saha Equation Problems/Questions
... simply corresponds to the energy of the ground state: E1 =χi =13.6 eV. b) According to the Boltzmann equation, at T=85,000 K, only half of the atoms have been excited to n=2 (requiring an energy of 10.2 eV). On the other hand, it requires even more energy (13.6 eV) to ionize hydrogen. Consequently, ...
... simply corresponds to the energy of the ground state: E1 =χi =13.6 eV. b) According to the Boltzmann equation, at T=85,000 K, only half of the atoms have been excited to n=2 (requiring an energy of 10.2 eV). On the other hand, it requires even more energy (13.6 eV) to ionize hydrogen. Consequently, ...
Chemistry Semester Test Study Guide Chapters
... What state of matter has a definite volume and takes the shape of its container? Which state of matter takes both the shape and volume of its container? In a chemical reaction, what are the reactants and what are the products? If the total mass of the reactants in a chemical reaction is 60 g, what i ...
... What state of matter has a definite volume and takes the shape of its container? Which state of matter takes both the shape and volume of its container? In a chemical reaction, what are the reactants and what are the products? If the total mass of the reactants in a chemical reaction is 60 g, what i ...
PHYS 305 - Modern Physics (Spring 2016) Department of Physics
... The following general education goals and objective will be addressed by this course: • Effective communication through speaking and writing. • Critical thinking and problem solving. • Incorporate computational intelligence and knowledge for solving problems. METHODS OF EVALUATION Homework for each ...
... The following general education goals and objective will be addressed by this course: • Effective communication through speaking and writing. • Critical thinking and problem solving. • Incorporate computational intelligence and knowledge for solving problems. METHODS OF EVALUATION Homework for each ...
Atoms and Term Symbols
... • He: n = 1, s state, with 2 electrons in it, [y(r) = R10(r)Y00(q,f)], we put electron #1 into the space state and electron #2 into the same space state and then build the symmetric combination y (r ) 12 [ R10 (r1 )Y00 (q1 ,f1 ) R10 (r2 )Y00 (q 2 ,f2 ) R10 (r2 )Y00 (q 2 ,f2 ) R10 (r1 )Y00 (q1 ,f ...
... • He: n = 1, s state, with 2 electrons in it, [y(r) = R10(r)Y00(q,f)], we put electron #1 into the space state and electron #2 into the same space state and then build the symmetric combination y (r ) 12 [ R10 (r1 )Y00 (q1 ,f1 ) R10 (r2 )Y00 (q 2 ,f2 ) R10 (r2 )Y00 (q 2 ,f2 ) R10 (r1 )Y00 (q1 ,f ...
File - Septor CORPORATION
... Second Part of Talk Setting the PtRQM De Broglie wavelength l = ( h = (mo u) equal to the circumference of the Borh orbit r(n) = n ao in atomic hydrogen, (which I will discuss) and taking n=1 we get l-> (2 p a0) a from which we see that the Bohr orbit ao of the hydrogen atom has been decreased from ...
... Second Part of Talk Setting the PtRQM De Broglie wavelength l = ( h = (mo u) equal to the circumference of the Borh orbit r(n) = n ao in atomic hydrogen, (which I will discuss) and taking n=1 we get l-> (2 p a0) a from which we see that the Bohr orbit ao of the hydrogen atom has been decreased from ...
Module 36: Uncertainty relation Lecture 36: Uncertainty relation
... could also be measured with infinite accuracy and that violates Heisenberg’s principle. Hence the particle is never at rest inside the box and since it moves it would have certain kinetic energy (in the absence of any potential inside the box). The least enrgy, permitted by the uncertainty, is the g ...
... could also be measured with infinite accuracy and that violates Heisenberg’s principle. Hence the particle is never at rest inside the box and since it moves it would have certain kinetic energy (in the absence of any potential inside the box). The least enrgy, permitted by the uncertainty, is the g ...
Chemistry Study Guide
... Chemistry Study Guide Atoms and Subatomic Particles Atom. Al matter is made up of unique particles called atoms. An atom contains: o Protons- Positively charged; have atomic mass of one; Located in the nucleus of the atom. o Neutrons- Neutral in charge; the same mass as the proton; also located in ...
... Chemistry Study Guide Atoms and Subatomic Particles Atom. Al matter is made up of unique particles called atoms. An atom contains: o Protons- Positively charged; have atomic mass of one; Located in the nucleus of the atom. o Neutrons- Neutral in charge; the same mass as the proton; also located in ...
1) Which of the following concepts was discussed in Chapter 1
... 1) Increase the momentum of the particle 2) Decrease the momentum of the particle 3) Decrease the well width 4) Increase the well depth 5) Decrease the well depth ...
... 1) Increase the momentum of the particle 2) Decrease the momentum of the particle 3) Decrease the well width 4) Increase the well depth 5) Decrease the well depth ...
ExamView Pro
... 8. Electron diffraction shows a. that electrons behave like waves. b. the photoelectric effect. c. characteristic x ray spectra. d. that electrons in atoms have only certain allowed energies. 9. What quantities are plotted on a blackbody radiation curve? a. total radiated energy vs. temperature. b. ...
... 8. Electron diffraction shows a. that electrons behave like waves. b. the photoelectric effect. c. characteristic x ray spectra. d. that electrons in atoms have only certain allowed energies. 9. What quantities are plotted on a blackbody radiation curve? a. total radiated energy vs. temperature. b. ...
Chapter41_VG
... turning point at x = L, then it decays exponentially within the classically forbidden region. A similar analysis can be done for x ≤ 0. We can define a parameter η defined as the distance into the classically forbidden region at which the wave function has decreased to e–1 or 0.37 times its value at ...
... turning point at x = L, then it decays exponentially within the classically forbidden region. A similar analysis can be done for x ≤ 0. We can define a parameter η defined as the distance into the classically forbidden region at which the wave function has decreased to e–1 or 0.37 times its value at ...
I HALL EFFECT For a diffusive metal the Lorentz force law
... behavior. In analogy to the classical Hall constant we now define for the QHE: rH = − ...
... behavior. In analogy to the classical Hall constant we now define for the QHE: rH = − ...
Chapter 2 BIO 100 Chemistry
... Electron Energy Levels: • Electrons = Negatively (-) charged particles that orbit around the nucleus. ...
... Electron Energy Levels: • Electrons = Negatively (-) charged particles that orbit around the nucleus. ...
A Historical Perspective on Quantum Physics and its Impact on Society
... universal constant. Wien’s radiation law was commonly accepted among physicists due to its agreement with a series of experiments carried out in Berlin between 1897 and 1899. Even though Wien’s law appeared to be correct, it still lacked a theoretical foundation. Wien’s had justified his law using a ...
... universal constant. Wien’s radiation law was commonly accepted among physicists due to its agreement with a series of experiments carried out in Berlin between 1897 and 1899. Even though Wien’s law appeared to be correct, it still lacked a theoretical foundation. Wien’s had justified his law using a ...
Theoretical Physics T2 Quantum Mechanics
... falls on it. This property makes a black body a perfect source of thermal radiation. A very good realization of a black body is an oven with a small hole, see Fig. 1.1. All radiation that enters through the opening has a very small probability of leaving through it again. ...
... falls on it. This property makes a black body a perfect source of thermal radiation. A very good realization of a black body is an oven with a small hole, see Fig. 1.1. All radiation that enters through the opening has a very small probability of leaving through it again. ...
Bohr model
In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with attraction provided by electrostatic forces rather than gravity. After the cubic model (1902), the plum-pudding model (1904), the Saturnian model (1904), and the Rutherford model (1911) came the Rutherford–Bohr model or just Bohr model for short (1913). The improvement to the Rutherford model is mostly a quantum physical interpretation of it. The Bohr model has been superseded, but the quantum theory remains sound.The model's key success lay in explaining the Rydberg formula for the spectral emission lines of atomic hydrogen. While the Rydberg formula had been known experimentally, it did not gain a theoretical underpinning until the Bohr model was introduced. Not only did the Bohr model explain the reason for the structure of the Rydberg formula, it also provided a justification for its empirical results in terms of fundamental physical constants.The Bohr model is a relatively primitive model of the hydrogen atom, compared to the valence shell atom. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader and much more accurate quantum mechanics and thus may be considered to be an obsolete scientific theory. However, because of its simplicity, and its correct results for selected systems (see below for application), the Bohr model is still commonly taught to introduce students to quantum mechanics or energy level diagrams before moving on to the more accurate, but more complex, valence shell atom. A related model was originally proposed by Arthur Erich Haas in 1910, but was rejected. The quantum theory of the period between Planck's discovery of the quantum (1900) and the advent of a full-blown quantum mechanics (1925) is often referred to as the old quantum theory.