the energy of electron in first energy level is `-21.79 xx 10^(12) erg//` atom. What will be energy in second energy level ?

Options

A. `-54 .47 xx 10^(2) erg // atom`
B. `-5.447 xx 10^(12) erg // atom`
C. `-5.5447 xx 10^(12) erg // atom`
D. `0.05447 xx 10^(12) erg // atom`

Answer

B

Explanation

`E= - (21.79 xx 10^(12))/( n^(2))`
`=-(21.79 xx 10^(12))/(2^(2)) =-5.4475 xx 10^(12 erg // atom`