## Chapter 2 S**tructure of Atom**

Below are the important questions along with the answers . These questions are most asked in the recent school exams. These are totally based on the CBSE board curriculum. We recommend everyone, do not skip these questions

**Structure of Atom ImportantQuestions Theory based**

**Q1. **Define the term wavelength.

**Q2. **What is meant by electromagnetic nature of light?

**Q3. **Define the term frequency.

**Q4. **What is the speed of light in vacuum?

**Q5. **Give the significance of principal quantum number.

**Q6. **Give the significance of azimuthal quantum number.

**Q7. **Give the significance of magnetic quantum number.

**Q8. **Give the significance of spin quantum number.

**Q10. **The line spectrum observed when electrons fall from higher quantum levels to L level is referred to as (a)Balmer series (b) Lyman series (c) Paschen series (d) Brackett series

**Q11. **Define the term black body and black body radiation.

**Q12. **Explain Thomson model of atom.

**Q13. **Define the tern photoelectric effect.

**Q14. **Write the Bohr rule relating the energy difference to the frequency of radiation.

**Q15. **What is the energy of lowest energy level of hydrogen atom?

**Q16. **Write the mathematical expression of de Broglie equation.

**Q17. **State Aufbau principle.

**Q18. **State Heisenberg’s Uncertainty Principle.

**Q19. **State Pauli’s Exclusion Principle.

**Q20. **State Hund’s Rule of Maximum Multiplicity.

**For More Questions with Answers Download PDF file**

**Structure of AtomImportant Questions Numerical based**

**Q1. **Calculate (a) wavenumber and (b) frequency of yellow radiation having wavelength

**Q2. **Derive de Buglie’s equation.

**Q3. **Calculate energy of one mole of photons of radiation whose frequency is

**Q4. **What is the wavelength of light emitted when

the electron in a hydrogen atom undergoes transition an energy level with n = 4 to an energy level with n = 2 ?

**Q5. **A 100-watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

## Structure of Atom

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