Question

Hydrogen atom excites energy level from fundamental state to n = 3. Number of spectral lines according to Bohr, is(a) 4(b) 3(c) 1(d) 2

Answer 1

(a) 4

hope it is correct

Answer 2

Answer:

D) 2

Explanation:

Every atom has an orbit where (n=principal quantum number ) and every orbit has a subshell. Every subshell of same orbit contains different energy. One electron of hydrogen is excited to the 3rd principal shell means that electron is staying or exist in one of the subshell of third orbit. Thus the  three spectral or emission lines possible as the third orbit contains three sub shells having different energy are  3s , 3p and 3d.  

r∝ n²

For ground state n=1

and for first excited state n=2

Thus the number of spectral lines according to bohr are 2