The ionization energy of sodium in kJ mol – 1 . If electromagnetic radiation of wavelength 242 nm is just sufficient to ionize sodium atom is ______.(nearest integer)

Question

The ionization energy of sodium in kJ mol – 1 . If electromagnetic radiation of wavelength 242 nm is just sufficient to ionize sodium atom is ______.(nearest integer),

MARKS App · Accepted Answer

The ionisation energy of one sodium atom = hc λ & the ionisation energy of one mole Na atom = hc λ N A = 6 . 62 × 10 - 34 × 3 × 10 8 × 6 . 02 × 10 23 242 × 10 - 9 = 494 . 03 kJ / mol

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