Closely examine the diagram representing the positron emission of carbon-10 and draw the missing nucleus.
Here, we are going to draw the missing nucleus.
In a nuclear reaction, the sum of the superscripts (mass numbers, A) for the reactants must be equal to the sum of the superscripts for the products. Similarly, the sum of the subscripts (atomic numbers, Z) for the reactants must be equal to the sum of the subscripts for the products.
The nucleus given in the reactant side has 6 protons, i.e., its atomic number is 6. Thus the nucleus is C.
The positron is represented by the symbol e.