Question Text
Question 1 :
<span>On moving left to right in a period, electron affinity of elements:</span>
Question 5 :
According to the electromagnetic spectrum, radio waves have the ______frequency and the  __________ wavelength.<br/>
Question 7 :
According to the electromagnetic spectrum. Which of the following is NOT a pure spectral colour?<br/>
Question 9 :
If $c$ is the speed, $\nu$ is frequency and $\displaystyle \lambda $ is wavelength of EM waves, then
Question 10 :
According to the electromagnetic spectrum, As the frequencies of the pure spectral colours increase, the wavelengths of the colours:<br/>
Question 12 :
Bohr modified the ___________ by adding that the electrons move in orbits of fixed size and energy.
Question 14 :
Which of the following could be justified by Bohr's atomic model?
Question 15 :
The ratio of energy to frequency of a radiation emitted by an electron is equal to :