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Class 11 Chemistry Practice Test: Structure of Atom - Towards Quantum Mechanical Model of the Atom
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A major problem with Bohr's model was that it treated electrons as particles that existed in precisely-defined orbits.

The quantum mechanical model of atoms describes the three-dimensional position of the electron in a probabilistic manner according to a mathematical function called a wavefunction, often denoted as ψ. Atomic wavefunctions are also called orbitals.

Class 11 Chemistry Practice Test: Structure of Atom - Towards Quantum Mechanical Model of the Atom
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10 Questions

1. Mass of a photon is given by 3.313 x 10-34 kg. Find it’s wavelength.
2. If the kinetic energy of an electron is 5J. Find out its wavelength.
3. The uncertainty of a ball is given by 0.5A°. Then calculate the uncertainty in momentum.
4. Determining the exact position and velocity of an electron is impossible at a time.
5. Who found out about dual behavior of a matter?
6. A ball of mass 0.5kg is moving with velocity 6.626 m/s. What’s the wavelength of that ball?
7. Δx. Δp ≥ h/4π.
8. An object has a mass of 6 kg and velocity of 10 m/s. The speed is measured with 5% accuracy, then find out Δx in m.
9. If the uncertainties in position and momentum are equal, then the uncertainty in position is given by ____
10. As per Heisenberg’s principle of uncertainty, the relation between relative momentum and relative position is __________