NCERT Solutions for Chapter: Structure of Atom, Exercise 1: Short Answer Type

What is the experimental evidence in support of the idea that electronic energies in an atom are quantized?

Out of electron and proton which one will have, a higher velocity to produce matter waves of the same wavelength? Explain it.

A hypothetical electromagnetic wave is shown in Figure. Find out the wavelength of the radiation.

Chlorophyll present in the green leaves of plants absorbs light at $4.620\times {10}^{14} \mathrm{Hz}$. Calculate the wavelength of radiation in the nanometer. Which part of the electromagnetic spectrum does it belong to?

What is the difference between the terms orbit and orbital?

Table-tennis ball has a mass $10 \mathrm{g}$ and a speed of $90 \mathrm{m}/\mathrm{s}$. If speed can be measured within an accuracy of $4\%$, what will be the uncertainty in speed and position?

The effect of uncertainty principle is significant only for motion of microscopic particles and is negligible for the macroscopic particles. Justify the statement with the help of a suitable example.

Hydrogen atom has only one electron, so mutual repulsion between electrons is absent. However, in multielectron atoms mutual repulsion between the electrons is significant. How does this affect the energy of an electron in the orbitals of the same principal quantum number in multielectron atoms?