1.

Studiedtheradioactivityand developed it ._(6) ^(14)C._(6)^(13) C ._(7) ^(14) N._(6)^(12) C

Answer»

SOLUTION :ISOBARS`._(6)^(14) C._(7)^(14)N ` …. Samemassnumber
Isotops `._(6)^(14)C ._(6)^(15) N ,_(6)^(12) C`….. Sameatomicnumber


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