HARD
11th ICSE
IMPORTANT
Earn 100

What is the energy in joules required to excite the electron of the hydrogen from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is -2.18×10-11 ergs.

Important Questions on Structure of Atom

HARD
11th ICSE
IMPORTANT
ALL IN ONE ISC Chemistry CLASS 11>Chapter 2 - Structure of Atom>Chapter Practice>Q 22
The effect of uncertainty principle is significant only for motion of microscopic particles and is negligible for the macroscopic particle. Justify the statement with the help of a suitable example.
MEDIUM
11th ICSE
IMPORTANT
ALL IN ONE ISC Chemistry CLASS 11>Chapter 2 - Structure of Atom>Chapter Practice>Q 22
Calculate the velocity condition for the wavelength associated with a moving electron to be equal to the wavelength associated with a moving proton. (Mass of electron=9.11×10-28 g; Mass of proton=1.67×10-24 g; h=6.6×10-34 Js; J≡kgm2s-2)
HARD
11th ICSE
IMPORTANT
ALL IN ONE ISC Chemistry CLASS 11>Chapter 2 - Structure of Atom>Chapter Practice>Q 23
Why is +2 oxidation state of Mn (25) quite stable, while the same is not true for iron (26)?
HARD
11th ICSE
IMPORTANT
ALL IN ONE ISC Chemistry CLASS 11>Chapter 2 - Structure of Atom>Chapter Practice>Q 23
What is meant by dual nature of electrons? Calculate the energy and wavelength of the photon emitted by hydrogen atom when electron makes a transition from n=2 to n=1. Given that the ionisation potential is 13.6 eV (1eV=1.6×10-19 J).