ahmedabudief

Dr. Ahmed Mohammed Abu-Dief Mohammed

Assistant Professor - Assistant professor of Inorganic and Physical Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street

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Physical Chemistry 3

2019-10-13 01:13:45 |

Physical Chemistry III covers the introduction of quantum chemistry and molecular spectroscopy. In quantum chemistry, students are exposed to the basic principles that govern the structure and properties of individual atoms and molecules. The experimental results that overthrew the concepts of classical mechanics will also be discussed. In molecular spectroscopy, students will learn the fundamental concepts of rotational and vibrational spectroscopy, the electronic spectra of diatomic and polyatomic molecules, and the fundamental concepts of magnetic resonance spectroscopy.

Attachments



2019-10-23 21:24:33 | Physical Chemistry 3
Vibration spectra
* WHICH SPECTROSCOPY METHOD IS USED TO STUDY MOLECULAR VIBRATIONS? * IR SPECTROSCOPY * MICROWAVE SPECTROSCOPY * UV SPECTROSCOPY VISIBLE SPECTROSCOPY... Read more

2019-10-15 16:20:43 | Physical Chemistry 3
The separation of the electronic energy levels
Atomic sodium produces a yellow glow resulting from the emission of radiation of 590 nm. Calculate the separation of the electronic energy levels responsible for this spectroscopic transition... Read more

2019-10-15 16:28:28 | Physical Chemistry 3
Probability
Calculate the relative probabilities of finding the electron inside a region of volume 1.0 pm3, located at (a) the nucleus, (b) a distance a o from the nucleus... Read more

2019-10-16 23:49:44 | Physical Chemistry 3
blank constant
ħ which is a convenient modification of Planck’s constant: a) ℏ= 2ℎ/𝜋 b) ℏ= ℎ/𝜋 c) ℏ= ℎ/_π2_ d) ℏ= ℎ/2𝜋... Read more

2019-10-23 21:11:04 | Physical Chemistry 3
d orbital
THE ORBITAL WITH L=2 IS CALLED……… * _P_ ORBITAL_P_ ORBITAL * _S _ORBITAL_S _ORBITAL * _D _ORBITAL_D _ORBITAL * _F_ ORBITAL_F_ ORBITAL... Read more

2019-10-23 21:13:22 | Physical Chemistry 3
wave function
* FOR WHICH OF THE FOLLOWING CONDITIONS WILL Ψ = 0 (FOR A HARMONIC OSCILLATOR)? * X = +∞ * X = -∞ * X = 0 * A AND B ARE CORRECT.... Read more

2019-10-13 11:11:07 | Physical Chemistry 3
Radiation
CHOOSE THE CORRECT ANSWER * IN CLASSICAL PHYSICS, RADIATION IS DESCRIBED IN TERMS OF AN: * oscillating electric field disturbance that travels through vacuum at a constant speed * oscillating electromagnetic disturbance that travels through vacuum at a constant speed * oscillating magnetic field d... Read more

2019-10-13 11:29:29 | Physical Chemistry 3
photoelectric effect
* THE PHOTOELECTRIC EFFECT AND ELECTRON DIFFRACTION ARE PHENOMENA THAT CONFIRM WAVE-PARTICLE DUALITY. WHAT IS MEANT BY WAVE-PARTICULAR DUALITY? * the wave character of matter and radiation * the particle character of matter and radiation * the joint particle and wave character of radiation * the jo... Read more

2019-10-24 07:02:16 | Physical Chemistry 3
Schrodinger equation
* SOLVE THE SCHRODINGER EQUATION MEANS: * Find only the eigenvalues of the hamiltonian operator for the system * Find only the eigenfunctions of the hamiltonian operator for the system * Find the eigenvalues and the eigenfunctions of the hamiltonian operator for the system 4. None of the above... Read more

2019-10-23 21:31:51 | Physical Chemistry 3
Magnetic quantum number
FOR A GIVEN VALUE OF _L_, THERE ARE …………… PERMITTED VALUES OF THE MAGNETIC QUANTUM NUMBER ML_FOR A GIVEN VALUE OF L_, THERE ARE …………… PERMITTED VALUES OF THE MAGNETIC QUANTUM NUMBER MLFOR A GIVEN VALUE OF _L_, THERE ARE …………… PERMITTED VALUES OF THE MAGNETIC QUANTUM NUM... Read more

2019-10-24 07:04:34 | Physical Chemistry 3
wave function 2
* WHEN TWO WAVEFUNCTIONS CORRESPOND TO THE SAME ENERGY THEY SAID TO BE * Normalized * Orthogonal * Degenerate * None of these... Read more

2019-11-01 13:57:14 | Physical Chemistry 3
Coulomb potential energy
Write an equation for calculating Coulomb potential energy of an electron in a hydrogenic atom.... Read more

2019-11-02 14:33:16 | Physical Chemistry 3
Hamiltonian
Write the equation which give the Hamiltonian for the electron and a nucleus of mass mN .... Read more

2019-11-04 00:08:31 | Physical Chemistry 3
Schrodinger equation 2
The Schrodinger equation for the internal motion of the electron relative to the nucleus is ......................... Read more

2019-11-04 00:44:34 | Physical Chemistry 3
The energies of ns orbitals
True or False The energies of ns orbitals increase (become less negative; the electron becomes less tightly bound) as n increases ( )... Read more

2019-11-14 22:24:15 | Physical Chemistry 3
Emission and Absorption
Defferentiate betwen Emission and Absorption spectoscopy?... Read more

IR

2019-11-14 22:44:11 | Physical Chemistry 3
IR
Which of is the following compounds are IR active? CHCl3- O2-Cl2- CCl4- C6H6... Read more

2019-11-14 23:16:14 | Physical Chemistry 3
Calculate
Radiation of wavelength 290 nm passed through 1.0 mm of a solution that contained an aqueous solution of the amino acid tryptophan at a concentration of 0.70 mmol dm-3. The light intensity is reduced to 60% of its initial value. Calculate the absorbance and the molar absorption coefficient of tryp... Read more

2019-11-14 23:21:39 | Physical Chemistry 3
Discuss
Discuss the differnt types of Rigid rotors ?... Read more

2019-11-22 09:11:54 | Physical Chemistry 3
radial wavefunctions
* THE SOLUTION OF THE RADIAL WAVEFUNCTIONS EQUATION WITH POSITIVE ENERGIES REFERS TO: * The unbound states of the electron. * The state in which the electron is ejected from the atom. * A higher energy state of the electron. * All of the above.... Read more

2019-11-22 09:18:19 | Physical Chemistry 3
quantum numbe
* WITH INCREASING QUANTUM NUMBER, N, THE ENERGY DIFFERENCE BETWEEN ADJACENT ENERGY LEVELS IN H ATOM………….. * decreases b) increases c) remains constant d) equals ∞... Read more

2019-11-22 09:42:01 | Physical Chemistry 3
orbital
* AN ORBITAL CAN HAVE MAXIMUM OF …………. ELECTRONS? * 2 b) 6 c) 10 d) 12... Read more

2019-11-22 09:43:06 | Physical Chemistry 3
allowed
* WHICH OF THE FOLLOWING TRANSITIONS ARE ALLOWED IN THE NORMAL ELECTRONIC EMISSION SPECTRUM OF AN ATOM: WHICH OF THE FOLLOWING TRANSITIONS ARE ALLOWED IN THE NORMAL ELECTRONIC EMISSION SPECTRUM OF AN ATOM: WHICH OF THE FOLLOWING TRANSITIONS ARE ALLOWED IN THE NORMAL ELECTRONIC EMISSION SPECTRUM OF A... Read more

2019-11-22 09:45:07 | Physical Chemistry 3
radial wavefunctions2
* WHICH OF THE FOLLOWING STATEMENT IS TRUE FOR THE RADIAL WAVEFUNCTIONS? * The radial wavefunctions depend on the values of both n and _l _ * The radial wavefunctions depend on the values of m_l_ . * Both (a) and (b) are true * Both (a) and (b) are wrong.... Read more

2019-11-22 09:52:34 | Physical Chemistry 3
Balmer series
* FROM THE SPECTRA OF A HYDROGENIC ATOM AND FOR THE BALMER SERIES, THE N1 IS EQUAL FROM THE SPECTRA OF A HYDROGENIC ATOM AND FOR THE BALMER SERIES, THE N1 IS EQUAL FROM THE SPECTRA OF A HYDROGENIC ATOM AND FOR THE BALMER SERIES, THE N1 IS EQUAL a)1 b) 2 c) 3 d) 4... Read more

2019-11-22 09:54:53 | Physical Chemistry 3
ionization energy
* THE MINIMUM ENERGY REQUIRED TO REMOVE AN ELECTRON FROM N = 1 TO N = ∞ IS CALLED: * The kinetic energy * The ionization energy * The emission energy * The work function... Read more

2019-11-22 10:38:12 | Physical Chemistry 3
Hamiltonian2
* THE HAMILTONIAN FOR THE ELECTRON AND A NUCLEUS OF MASS MN IS ………………………………………………………………………………………………………………………………………………………………………………………………THE HAMILTONIAN FOR T... Read more

2019-11-22 10:38:45 | Physical Chemistry 3
molecular spectra
* COMPARE BETWEEN ATOMIC AND MOLECULAR SPECTRA. (1 MARK)... Read more

2019-11-22 10:40:01 | Physical Chemistry 3
Bohr’s Theory
ACCORDING TO BOHR’S THEORY, CALCULATE THE ENERGY OF THE THIRD LEVEL OF HYDROGEN ATOM. (RH = 2.179 X 10-18 J)ACCORDING TO BOHR’S THEORY, CALCULATE THE ENERGY OF THE THIRD LEVEL OF HYDROGEN ATOM. (RH = 2.179 X 10-18 J)ACCORDING TO BOHR’S THEORY, CALCULATE THE ENERGY OF THE THIRD LEVEL OF HYDROGE... Read more

2019-12-01 09:44:22 | Physical Chemistry 3
The rotational  constant
The first rotational line in the rotational spectrum of CO is observed at 3.84235 cm-1. Calculate the rotational constant (B) and bond length of CO. The relative atomic weight C =12.00 and O = 15.9994, the absolute mass of H= 1.67343x10-27 kg.... Read more

2019-12-01 10:35:31 | Physical Chemistry 3
The bond  length
From microwave spectroscopy, bond lengths can be determined with a correspondingly high precision, as illustrated in this example. From the rotational microwave spectrum of 1H35Cl, we find that _B __= _10.59342 cm-1. Given that the masses of 1H and 35Cl are 1.0078250 and 34.9688527 amu, respect... Read more

2019-12-09 07:04:40 | Physical Chemistry 3
number of photons
* Calculate the number of photons emitted by a 100 W yellow lamp in 1.0 s. * Take the wavelength of yellow light as 560 nm and assume 100 per cent efficiency.... Read more

2019-12-09 07:05:43 | Physical Chemistry 3
de Broglie wavelength
_Estimate the wavelength of electrons that have been accelerated from rest through a potential difference of 40 kV_... Read more

2019-12-09 07:06:51 | Physical Chemistry 3
work function
GIVEN THAT THE WORK FUNCTION FOR SODIUM METAL IS 1.82 EV, WHAT IS THE THRESHOLD FREQUENCY?... Read more

2019-12-09 07:08:22 | Physical Chemistry 3
uncertainty
Suppose the speed of a projectile of mass 1.0 g is known to within 1 μms-1. _Calculate the minimum uncertainty in its position. _ Estimate Δp from mΔv, where Δv is the uncertainty in the speed... Read more

2019-12-09 09:26:06 | Physical Chemistry 3
wavelength
Calculate the wavelength (in nm) of a photon emitted by a hydrogen atom when its electron drops from the _n_ = 5 state to the _n_ = 3 state.... Read more