MEDIUM
JEE Main
IMPORTANT
Earn 100
As an electron makes a transition from an excited state to the ground state of a hydrogen-like atom/ion
50% studentsanswered this correctly
Important Questions on Atoms and Nuclei
HARD
JEE Main
IMPORTANT
Let be the number of particle emitted by of radioactive nuclei having a half life of . In , the number is close to
MEDIUM
JEE Main
IMPORTANT
A piece of wood from a recently cut tree shows decays per minute. A wooden piece of the same size placed in a museum (obtained from a tree cut many years back) shows decays per minute. If the half-life of is , then the age of the wooden piece placed in the museum is approximately
[This question was awarded a bonus and proper correction was made to avoid that]
EASY
JEE Main
IMPORTANT
For which of the following particles will it be most difficult to experimentally verify the de-Broglie relationship?
EASY
JEE Main
IMPORTANT
If the binding energy of the electron in a hydrogen atom is , the energy required to remove the electron from the first excited state of is :
MEDIUM
JEE Main
IMPORTANT
Hydrogen (1H1), Deuterium (1H2), singly ionised Helium (2He4)+ and doubly ionised lithium (3Li6)++ all have one electron around the nucleus. Consider an electron transition from to . If the wave lengths of emitted radiation are and respectively then approximately which one of the following is correct ?
MEDIUM
JEE Main
IMPORTANT
In a hydrogen like atom electron makes transition from an energy level with quantum number to another with quantum number . If , the frequency of radiation emitted is proportional to :
MEDIUM
JEE Main
IMPORTANT
A particle of mass moves in a circular orbit in a central potential field If Bohr's quantization conditions are applied, radii of possible orbitals and energy levels vary with quantum number as:
EASY
JEE Main
IMPORTANT
Both the nucleus and the atom of some element are in their respective first excited states. They get de-excited by emitting photons of wavelengths respectively. The ratio is closest to:
