Question

A hydrogen like atom has 1 electron revolving .The energy required to excite the electron from the second orbit to the third orbit is 47.2 ev

Answer 1

Answer:

Z= 5

Explanation:

Aswe know ΔE =13.6*z^2(1/n1^2-1/n2^2)ev

so, 47.2ev = 13.6*z^2*(1/4-1/9)ev

    47.2  = 1.89 *z^2

     z^2 = 25

     Z = 5