Structure of At...

Which of the following statements in relation to the hydrogen atom is correct?

Which is correct statement about proton?

The time taken by the electron in one complete revolution in the $$n^{th}$$ Bohr's orbit of the hydrogen atom is 

The electrons identified by quantum numbers $$n$$ and $$l$$:
(1) $$n=4,l=1$$ (2) $$n=4,l=0$$
(3) $$n=3,l=2$$ (4) $$n=3,l=1$$
can be placed in order of increasing energy as 

The electrons identified by quantum  number $$n $$ and $$l$$:
$$(1)n=4,l=1\quad \quad \quad (2)n=4,l=0\\ (3)n=3,l=2\quad \quad \quad (4)n=3,l=1$$

The energy of an electron in first Bohr orbit of $$H$$ atom is $$-13.6 eV$$. The possible energy value (s) of excited state(s) for the electron in the Bohr orbits of hydrogen is/are:

Which one is the ground state?

Consider the following given species and find out, for which Bohr's atomic model is not applicable?

Which of the following gas is mono-atomic?

In an atom $$  2 \mathrm{K}, 8 \mathrm{L}, 8 \mathrm{M}, 2 \mathrm{N}  $$ electrons, the number of electrons present.If $$  \mathrm{m}=0, \mathrm{s}=1 / 2,  $$ are: