# Atomic Structure 1

Chemistry Level 3

Electromagnetic radiation of wavelength $$242$$ $$\text{nm}$$ is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in $$\text{kJ}$$ $$\text{ mol}^{-1}$$

Round off your answer to the nearest integer.

###### Source: This is a question from NCERT class 11.
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