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The ionisation energy of gaseous Na atom is 495.8 kJ mol−1 . The lowest possible frequency of light that can ionise a Na atom is : 

(a) 1.24 × 1012 s −1 

 (b) 3.15 × 1014s −1 

(c) 4.76 × 1014s −1 

 (d) 1.24 × 1015s −1

1 Answer

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Best answer

Correct option (d) 1.24 × 1015s −1

Explanation:

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