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An Electro magnetic radiation of wavelen...

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

`494.5`

B

`246.9`

C

`989.0`

D

`794.5`

Text Solution

Verified by Experts

The correct Answer is:
B
`E = (hc)/(lambda) = E xx N_(A)`
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