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The wavelength of K(a) line copper is 1....

The wavelength of `K_(a)` line copper is `1.5Å`. The ionisation energy of K electron in copper is

A

`11.2xx10^(-17)J`

B

`12.9xx10^(-16)J`

C

`1.7xx10^(-15)J`

D

`10xx10^(-16)J`

Text Solution

Verified by Experts

The correct Answer is:
B
Required inisation energy , `E=(hc)/(lambda)`
`(=6.6xx10^(-34)xx3xx10^(8))/(1.5xx10^(-10))=12.9xx10^(-16)J`
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