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The first ionization energy of Na is 495...

The first ionization energy of Na is 495.9 kJ `mol^(-1)` . What is the longest wavelength of light that could remove an electron from a Na-atom?

A

`2.41 xx 10^(-7)m`

B

`2.41 xx 10^(-4)m`

C

4.14 m

D

`4.14 xx 10^(3) m`

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The correct Answer is:
A
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