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An Electro magnetic radiation of wavelength 484 nm is just sufficient of ionise a sodium atom. Calculate the ionisation energy of sodium in kJ/mo, approximately?

A

`246.9`

B

`594.5`

C

`694.5`

D

`794.5`

Text Solution

Verified by Experts

The correct Answer is:
A
`E = (hc)/(lambda)` Energy of one mole `=E xx N_(A)`
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