S C Kheterpal, S N Dhawan and, P N Kapil Solutions for Chapter: Structure of Atom, Exercise 13: ADDITIONAL QUESTIONS

How does mass number differ from atomic mass? How do atomic number $\left(\mathrm{Z}\right)$ and mass number $\left(\mathrm{A}\right)$ help to calculate the number of electrons, protons and neutrons in an atom ?

What were the main points of Electromagnetic wave theory? What were its limitations? How have these been overcome by Planck's quantum theory?

Briefly explain what do you understand by black body radiation and photoelectric effect? What is work function? How they led to the concept of particle nature of electromagnetic waves?

Write short note on the following : Solar spectrum or continuous spectrum

Write short note on the following : Atomic spectra or line spectra

Briefly describe each of the following : How the study of quantum numbers led to Pauli exclusion principle ?

Briefly describe each of the following : Using the concept of quantum numbers, calculate the distribution of electrons as well as maximum number of electrons in the $\mathrm{N}$-shell ($4^{\mathrm{th}}$ shell).

What do you understand by an atomic orbital? Briefly describe the shapes of $\mathrm{s}, \mathrm{p}$ and $\mathrm{d}$ orbitals.