EASY
12th ICSE
IMPORTANT
Earn 100

What is the significance of the ‘distance of closest approach of -particles to atomic nuclei?

Important Questions on Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom
EASY
12th ICSE
IMPORTANT
For scattering of -particles at large angles, only the nucleus of the atom is responsible, not the electron. Why?

EASY
12th ICSE
IMPORTANT
Is the probability of scattering of -particles at angles greater than predicted by Thomson’s atomic model less, same or greater than that predicted by Rutherford’s model?

EASY
12th ICSE
IMPORTANT
Write the order of magnitude of the radius of nucleus.

EASY
12th ICSE
IMPORTANT
What is the order of the size of the atom?

EASY
12th ICSE
IMPORTANT
According to Bohr, the angular momentum of an orbiting electron is quantised, what is meant by this statement?

EASY
12th ICSE
IMPORTANT
What is Bohr's quantisation condition for the angular momentum of an electron in the second orbit?

EASY
12th ICSE
IMPORTANT
Calculate angular momentum of an electron in the third Bohr orbit of hydrogen atom.

EASY
12th ICSE
IMPORTANT
What is Bohr's frequency condition?
