Recent questions and answers in Atomic Structure

The energy of second Bohr orbit of hydrogen atom is $-328\;kJ mol^{-1}$ , hence energy of fourth Bohr orbit would be

answered Jul 30, 2018 by meena.p

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A bulb emits light of wavelength $4500\;A$ . The bulb is rated as $150\;walt$ and $8\%$ of the energy is emitted as light. How many photons are emitted by the bulb per second .

answered Jul 30, 2018 by meena.p

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A certain particle carries $2.5 \times 10^{-16}\;C$ of static electric charge. Calculate the number of electrons present in it .

answered Jul 30, 2018 by meena.p

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The electron of the same orbitals can be distinguished by

answered Jul 27, 2018 by meena.p

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Find the wavelength of 100 g particle moving with velocity $100 ms^{-1}$

answered Jul 27, 2018 by meena.p

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A moving electron has $5 \times 10^{-25}$ joules of kinetic energy. What is the de-Brogile wavelength ?

answered Jul 27, 2018 by meena.p

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Sodium street lamp gives off a characteristic yellow light of wave length $588\;nm$ calculate the energy mole (in KJ/mol) of these photons .

answered Jul 27, 2018 by meena.p

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Calculate the wave number for the shortest wavelength transition in the Balmer series of atomic hydrogen .

answered Jul 27, 2018 by meena.p

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Calculate the wavelength and energy of radiation emitted for the electronic transition from infinity to stationary state on of the hydrogen atom .

answered Jul 27, 2018 by meena.p

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Maximum number of electrons in a subshell with $f=3$ and $n=4$

answered Jul 26, 2018 by meena.p

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If $n=6$, the correct sequence for filling of electrons will be

answered Jul 26, 2018 by meena.p

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The total number of atomic orbitals in fourth energy level of an atom is

answered Jul 26, 2018 by meena.p

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The correct set of four quantum number for the valence electron of rubidium atom $(Z=37)$ is :

answered Jul 26, 2018 by meena.p

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The ratio of the difference in energy between the first and second Bohr orbit to that between the second and the third Bohr orbit is

answered Jul 26, 2018 by meena.p

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Which one of the following ions has electronic configuration $[Ar]3d^6?$

answered Jul 25, 2018 by meena.p

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Deuterium nucleus contains

answered Jul 25, 2018 by meena.p

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Calculate the Broglie wavelength of an electron moving with 1% of the speed of light ?

answered Jul 25, 2018 by meena.p

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The uncertainty in the position of a moving bullet of mass 10 g is $10^{-5}\;m$. Calculate the uncertainty in its velocity ?

answered Jul 25, 2018 by meena.p

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Calculate wave number of yellow radiations having wavelength of $5800\; A_0$ .

answered Jul 25, 2018 by meena.p

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Which of the following is not permissible arrangement of electrons in an atom ?

answered Jul 25, 2018 by meena.p

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Maximum number of electrons in a subshell of an atom is determined by the following

answered Jul 25, 2018 by meena.p

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If uncertainty in position and momentum are equal, then uncertainity in velocity is

answered Jul 25, 2018 by meena.p

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Given : The mass of electron is $9.11 \times 10^{-31}\;kg$ . Planck constant is $6.626 \times 10^{-34}\;Js$ the uncertainty involved in the measurement of velocity within a distance of $0.1\;A$ is :

answered Jul 25, 2018 by meena.p

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The orientation of an atomic governed by

answered Jul 25, 2018 by meena.p

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When electrons are passed through electromagnetic field, electrons are deflected away from

answered Jul 23, 2018 by meena.p

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$Mg^{2+}$ is isoelectronic with

answered Jul 23, 2018 by meena.p

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Identify the wrong statement in the following

answered Jul 23, 2018 by meena.p

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Find energy of each of the photons which correspond to light of frequency $3× 10^{15}\; Hz.$

answered Jul 23, 2018 by meena.p

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Write the complete symbol for the atom with the given atomic number (Z) and Atomic mass (A) $Z = 92, A = 233$

answered Jul 23, 2018 by meena.p

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Find the total mass of protons in 34 mg of $NH_3$ at STP.

answered Jul 20, 2018 by balaji.thirumalai

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Which of the following is the energy of a possible excited state of a possible excited state of hydrogen?

answered Jul 20, 2018 by swapnarajan1982

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Calculate the wavelength (in nanometer) associated with a proton moving at a velocity $1.0\times10^3ms^{-1}$ (mass of proton =$1.67\times10^{-27}kg \;and\; h = 6.63\times10^{-34}Js)$

answered Jul 20, 2018 by swapnarajan1982

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The de Broglie wavelength of a tennis ball of mass 60g movig with a velocity of 10 metres per second is approximately. Planck's constant, $h= 6.63\times10^{-34}Js$

answered Jul 20, 2018 by swapnarajan1982

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In a hydrogen,if energy of an electron in the ground state is 13.6 eV, then that in the 2nd excited state is

answered Jul 20, 2018 by swapnarajan1982

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The energy of an electron in the first Bohr orbit of H atom is −13.6eV . The possible energy value(s) of the excited state(s) for electrons in Bohr orbits to hydrogen is(are)

answered Jul 20, 2018 by swapnarajan1982

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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

answered Jul 20, 2018 by swapnarajan1982

1 answer