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what are ISOELECTRONIC SPECIES and give examples.
a block of mass 'm' is placed on a smooth wedge of inclination of theta.the whole system is accelerated horizontally so that the block does not slip on the wedge.The force exerted by the wedge on block has a magnitude.
Why is Fe3+ ion more stable than Fe2+ ion?
drawbacks of j j thomson atomic models
What will be total spin of Fe3+ ion? As its have 3 valence electrons ...spin shoud be 3 x 1/2 but ans. is 5x1/2...how is it possible.please give suitable explanation and common method to find total spin for ions?
explain pauli's exclusion principle
What's is hunds rule of maximum multiplicity Explain with many example and how is it different from the other
Why is electron gain enthalpy of chlorine is more than fluorine?
Q.) Which transition of Li2+ is associated with same energy change as n=6 to n=4 transition in He+.
(I) n=3 to n=1 (II) n=8 to n=6 ( III) n=9 to n=6 (IV) n=2 to n=1
Calculate the energy associated with the 1st orbit of He+. What is the radius of the orbit?
Pls give the answer in steps..!
calculate mass of photon with wavelength 3.6 A . ?
In a sample of H- atom, electron makes transition from 5thexited state upto ground state, producing all possible types of photons. Then number of lines in the infrared region are :
why electon cannot exist in the nucleus?
ratio of e/m of electron and alpha particle is
the first emission line in the atomic spectrum of hydrogen in the balmer series appears at-
1. 5R/36 /cm 2.3R/4/cm 3.7R/144/cm 4.9R/400/cm
what is the maximum number of electrons which can be accommodated in an atom in which the highest principal quantum number values is 4?
the wave number for the longest wavelength transition in the Balmer
series of atomic hydrogen.
What is the derivation of the radius of the nth orbit in bohr's model?
the formula is Rn = (4πε0)n2h2 / 4π2me2
Write the electronic configuration of (i) Mn4+, (ii) Fe3+ (iii) Cr2+ and Zn2+ Mention the number of
unpaired electrons in each case.
In an atom two electrons move around the nucleus in circular orbit of radii R and 4R. The ratio of time taken by them to complete one revolution is
(a)1:8 (b)4:1 (c)1:4 (d)8:7
Why do half filled and completely filled orbitals have extra stability?
Calculate the wavelength of first and last line in the Balmer series of Hydrogen spectrum.
Calculate the wave number of the spectral lines of shortest wave length appearing in the balmer series of hydrogen spectrum. given , R=1.09 * 10 to the power of 7 m-1.
state Heisenberg's Uncertainty principle?
Give any 5 differences between ORBIT ORBITALS
The mass of an electron is 9.1x10-31kg.If its kinetic energy is 3.0x10-25J.CALCULATE ITS WAVELENGTH........
Light of wavelength 5000 A falls o n a metal surface of work function 1.9 eV . Find (a ) the energy of photons (b) kinetic energy of photoelectrons . [1eV = 1.6 * 10 (-19) J ] please answer fast
why are bohr's orbits called stationary states?
calculate the mass and charge of one mole of electron?
Find (a) the total number and (b) the total mass of neutrons in 7 mg of 14C.
(Assume that mass of a neutron = 1.675 × 10–27 kg).
Explain and derive schrodinger wave equation for hydrogen and hydrogen like species.
With what velocity should an alpha particle travel towards the nucleus of a copper atom so as to arrive at a distance 10-13 m from the nucleus of a copper atom?
Calculate the mass of a photon of sodium light having wavelength 5894 A0 & velocity as 3108 ms - 1
Calculate energy of one mole of photons
what are the frequency and wavelenght of a photon emitted during a transition from n=5 state to n=2 state in the hydrogen atom
what is the difference between 2O and O2
how many nodal planes are there in dz2 orbital ??? ( most of the authors wrote 2 , bt sme renowned experts wrote ZERO ) so m confused between zero n two ???
DIFFERENCE BETWEEN WAVE AND PARTICLE NATURE? IN BRIEF
What is photoelectric effect?
An element has electronic configuration [Ar] 3d4 in its +3 oxidation state.What will be the electronic configuration of its atom?
How many photons of light having a wavelength 400 nano meter are necessary to provide 1 joule of energy?
calculate the no. of protons in 10g of CaCO3 . NA=6.02* 1023.
correct set of quantum number for unpaire electron in chlorine
Two particles A and B are in motion. If the wavelength associated with particle A is 5x10^-8m, calculate wavelength associated with B if its momentum is half of A
The kinetic energy of a subatomic particle is 5.85x10^-25 J. Calculate the frequency of the particular wave.
In a Bohr's model of atom when an electron jumps from n=1 to n=3, how much energy will be emitted or absorbed?
a) 2.15*10-11 erg
b) 0.1911*10-10 erg
c) 2.389*10 -12 erg
d) 0.239*10-10 erg
What is black body radiation?
difference between notation of 'l' and 'L'.
A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate
What are planck's postulates..??
Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in kJ mol–1.
what is the difference between absorption and emission spectrum
how many nodal planes are there for principle quantum number n=3. plz explain in detail.
What are quantum numbers?
calculate the wavelength , frequency nd wavenumber of a light wave whose period is 2.0 x 10-10
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