In the following diagram, which particle has highest $e/m$ value?
$A$
$B$
$C$
$D$
The absorption transitions between the first and the fourth energy states of hydrogen atom are $3.$ The emission transitions between these states will be
Choose the correct option from the following options given below
If radiation of allow wavelengths from ultraviolet to infrared is passed through hydrogen agas at room temperature, absorption lines will be observed in the :
In third orbit of hydrogen atom, de Broglie wavelength of electron is $\lambda $ then radius of third orbit is
What is the atomic number of gold ?