An atom of carbon-11 emits a positron. Express your answer as a nuclear equation.

Answer 1

The nuclear equation is (with conservation of mass number A and charge number Z):

(A=11, Z=6)C --> (A=11, Z=5)B + (A=0, Z=1)e + neutrino.

with (A=0, Z=1)e = positron.

Note: You are not obliged to write the neutrino in High School (it's here for the energy conservation).

Note: It's radioactivity beta+.