1.

Which of the following statements about electron capture is/are correct ?

Answer»

<P>An outer shell VALENCE electron is used
The electron is used to convert a proton to a neutron
In electron capture decay , the MASS NUMBER remains unchanged
In electron capture decay , the atomic number decreases by one

Solution :`""_(+1) P^(1) + ""_(-1) e^(0) to ""_(0) N^(1)` , So `.Z.` decrease by 1 unit and A remains same


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