 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.

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

2019-10-15 16:20:43 | Physical Chemistry 3
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...

2019-10-15 16:28:28 | Physical Chemistry 3
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...

2019-10-16 23:49:44 | Physical Chemistry 3
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...

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

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

2019-10-13 11:11:07 | Physical Chemistry 3
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...

2019-10-13 11:29:29 | Physical Chemistry 3
* 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...

2019-10-24 07:02:16 | Physical Chemistry 3
* 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...

2019-10-23 21:31:51 | Physical Chemistry 3
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...

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

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

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

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

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

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

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

2019-11-14 23:16:14 | Physical Chemistry 3
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...

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

2019-11-22 09:11:54 | Physical Chemistry 3
* 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....

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

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

2019-11-22 09:43:06 | Physical Chemistry 3
* 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...

2019-11-22 09:45:07 | Physical Chemistry 3
* 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....

2019-11-22 09:52:34 | Physical Chemistry 3
* 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...

2019-11-22 09:54:53 | Physical Chemistry 3
* 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...

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

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

2019-11-22 10:40:01 | Physical Chemistry 3
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...

2019-12-01 09:44:22 | Physical Chemistry 3
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....

2019-12-01 10:35:31 | Physical Chemistry 3
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...

2019-12-09 07:04:40 | Physical Chemistry 3
* 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....

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

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

2019-12-09 07:08:22 | Physical Chemistry 3
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...

2019-12-09 09:26:06 | Physical Chemistry 3
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....