1.

Which of the following statement is/are incorrect ?

Answer»

the end nuclide formed in thorium (4n) series is `""_(81) BI^(200)`
`""_(7) N^(15)` and `""_(8) O^(16)` are isobars .
`""_(20) Ca^(40)` has magic number of protons and magic number of neutrons
The radius (R) of a nuclide of MASS number A is given by the equation `R = R_(0) (A)^(1//3)`

Solution :`""_(83) Bi^(200) implies ` not found in any series


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