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Assertion : An example of K-capture is ._(56)^(133)Ba + e^(-) rarr ._(55)^(133)Cs + X-ray. Reason : The atomic number decreases by one unit as result of K-capture

Answer»

If both assertion and reason are TRUE and the reason is the correct explanation of the assertion
If both assertion and reason are true but reason is not the correct explanantion of the assertion
If assertion is true but reason is false
If the assertion and reason both are false

Solution :In some nuclides, the nucleus MAY capture an electron from the K--shell and the VACANCY created is filled by electrons from higher levels giving rise to CHARACTERISTIC X-rays. This PROCESS is known as K-electron capture or simply K-capture.


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