Recent questions tagged atomic-structure

An ion $Mn^{a+}$ has the magnetic moment equal to 4.9bm. What is the value of a ?

asked Jul 30, 2018 by meena.p

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

asked 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 .

asked 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 .

asked Jul 30, 2018 by meena.p

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The electron of the same orbitals can be distinguished by

asked Jul 27, 2018 by meena.p

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

asked 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 ?

asked 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 .

asked 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 .

asked 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 .

asked Jul 27, 2018 by meena.p

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

asked Jul 26, 2018 by meena.p

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

asked Jul 26, 2018 by meena.p

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

asked 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 :

asked 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

asked Jul 26, 2018 by meena.p

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

asked Jul 25, 2018 by meena.p

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Deuterium nucleus contains

asked 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 ?

asked 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 ?

asked Jul 25, 2018 by meena.p

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

asked Jul 25, 2018 by meena.p

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

asked 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

asked Jul 25, 2018 by meena.p

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

asked 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 :

asked Jul 25, 2018 by meena.p

1 answer

The orientation of an atomic governed by

asked Jul 25, 2018 by meena.p

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

asked Jul 23, 2018 by meena.p

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$Mg^{2+}$ is isoelectronic with

asked Jul 23, 2018 by meena.p

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Identify the wrong statement in the following

asked Jul 23, 2018 by meena.p

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

asked 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) $Z = 92, A = 233$

asked Jul 23, 2018 by meena.p

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

asked 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?

asked 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 =$1.67\times10^{-27}kg \;and\; h = 6.63\times10^{-34}Js)$

asked 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, $h= 6.63\times10^{-34}Js$

asked 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

asked 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)

asked 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

asked Jul 20, 2018 by swapnarajan1982

1 answer