The following nuclear equations is correct with respect to the mass number and atomic number of each particle as well as its symbol.
189F⟶188O+0+1e
The sum of atomic numbers on the left hand side of the equation is equal to the sum of atomic numbers on the right hand side of the equation.
The sum of mass numbers on the left hand side of the equation is equal to the sum of mass numbers on the right hand side of the equation.