Atoms Test - 23...

Cathode rays ___________.

An electron jumps from $6^{th}$ shell in an hydrogen atom, the number of Lyman emission lines will be:

What is the wavelength of the most energetic photon emitted in the Balmer's series of the hydrogen atom?

'Electrons revolve round the nucleus in well-defined orbits, like planets revolve round the sun' was the brainchild of.

Cathode rays are passing through a discharge tube. In the tube, there is

Which one of the following device makes use of the electrons to strike certain substances to produce fluorescence?

The number of significant figure in $6.023 \times 10 ^ { 23 } \mathrm { mole } ^ { - 1 }$ is

To which of the following the angular velocity of the electron in the n-th Bohr orbit is proportional ? 

Cathode rays constitute a stream of 

Two photons having _________________.