The ionisation energy of gaseous Na(sodium) atoms is 495.80 kJ/mol. The lowest possible frequency of light that can ionise a Na(sodium) atom is how much?. Please explain the process in detail.

Asked by Pragnya Kar | 28th May, 2014, 12:22: PM

Expert Answer:

E = h ?

where h = Plancks constant = 6.626 x 1034 J

? = reqd. frequency

E = 495.8 x 103 J

? = E /h

? = 495.8 x 103 / 6.626 x 1034

? = 74.83 x 10-31

Answered by Prachi Sawant | 28th May, 2014, 05:38: PM