[" Q.9(A): The radii of corresponding orbitals in all "H" - like particles are equal "],[" (R) : All "H" - like particles contain only one electron "]

Do pure substances contain only one kind of particle ?

A compound containing 80% C and 20% H is likely to be:

Statement -I : The angular momentum of an electron in n^(th) orbital it same for all H-like species . Statement -II : The velocity of electron in m^(th) orbit is equal for all H-like species.

(A): Smaller particles (Size (R) : Smaller particles (Size < 5 microns) are more likely to penetrate into the lungs.

Assertion (A): ‘H' & 'He' belongs to period - 1. Reason (R) : 'H & 'He' contain only one main shell 'K'.

For each of the following, state one phenomenon in which : (i) particles behave like waves. (ii) waves behave like particles.

All the material substances contain small particles.