Recent questions tagged atomic-structure
An ion $Mn^{a+}$ has the magnetic moment equal to 4.9bm. What is the value of a ?
atomic-structure
asked Jul 30, 2018 by meena.p
The energy of second Bohr orbit of hydrogen atom is $-328\;kJ mol^{-1}$ , hence energy of fourth Bohr orbit would be
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 .
A certain particle carries $2.5 \times 10^{-16}\;C$ of static electric charge. Calculate the number of electrons present in it .
The electron of the same orbitals can be distinguished by
Find the wavelength of 100 g particle moving with velocity $100 ms^{-1}$
A moving electron has $5 \times 10^{-25}$ joules of kinetic energy. What is the de-Brogile wavelength ?
Sodium street lamp gives off a characteristic yellow light of wave length $588\;nm$ calculate the energy mole (in KJ/mol) of these photons .
Calculate the wave number for the shortest wavelength transition in the Balmer series of atomic hydrogen .
Calculate the wavelength and energy of radiation emitted for the electronic transition from infinity to stationary state on of the hydrogen atom .
Maximum number of electrons in a subshell with $f=3$ and $n=4$
If $n=6$, the correct sequence for filling of electrons will be
The total number of atomic orbitals in fourth energy level of an atom is
The correct set of four quantum number for the valence electron of rubidium atom $(Z=37)$ is :
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
Which one of the following ions has electronic configuration $[Ar]3d^6?$
Deuterium nucleus contains
Calculate the Broglie wavelength of an electron moving with 1% of the speed of light ?
The uncertainty in the position of a moving bullet of mass 10 g is $10^{-5}\;m$. Calculate the uncertainty in its velocity ?
Calculate wave number of yellow radiations having wavelength of $5800\; A_0$ .
Which of the following is not permissible arrangement of electrons in an atom ?
Maximum number of electrons in a subshell of an atom is determined by the following
If uncertainty in position and momentum are equal, then uncertainity in velocity is
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 :
The orientation of an atomic governed by
When electrons are passed through electromagnetic field, electrons are deflected away from
$Mg^{2+}$ is isoelectronic with
Identify the wrong statement in the following
Find energy of each of the photons which correspond to light of frequency $3× 10^{15}\; Hz.$
Write the complete symbol for the atom with the given atomic number (Z) and Atomic mass (A) $Z = 92, A = 233$
Find the total mass of protons in 34 mg of $NH_3$ at STP.
asked Jul 20, 2018 by balaji.thirumalai
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
Calculate the wavelength (in nanometer) associated with a proton moving at a velocity $1.0\times10^3ms^{-1}$ (mass of proton =$1.67\times10^{-27}kg \;and\; h = 6.63\times10^{-34}Js)$
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, $h= 6.63\times10^{-34}Js$
In a hydrogen,if energy of an electron in the ground state is 13.6 eV, then that in the 2nd excited state is
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)
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
Discovery of the nucleus of an atom was due to the experiment carried out by
An atom of beryllium consists of 4 protons, 5 neutrons, and 4 electrons. The mass number of this atom is
A light paddle wheel moves when placed in the way of cathode rays. This shows the property of cathode rays that :
The conditions necessary for production of cathode rays are :
Which of the following statements is incorrect :
The discovery of neutron became very late because ::
Give the name and atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference between the numbers of total p and total s electrons.
Find energy of each of the photons which correspond to light of frequency $3\times 10^{15}Hz$.
structure-of-atom
Calculate the number of electrons which will together weigh one gram.
Using s,p,d and f notation, describe the orbital with the quantum numbers- (a) n=1,l=0
Calculate wave number of yellow radiations having wavelength of 5800 A0 .
Calculate the accelerating potential that must be applied to a proton beam to give it an effective wavelength of 0.005 nm.
If number of electrons of $^{37}X^-$ and $_{20}Y^{+2}$ are equal; find number of neutrons of $^{37}X^-$.