the atomic number increases by 1 during what type of radioactive decay?

³²₁₅P→ ⁰₋₁e+ ³²₁₆S

When an atom emits an atom emit a beta particle( negatron) , it atomic number increases by one while the atomic mass remain unchanged therefore for the reaction action , the missing nucleus will have an atomic number of 16, therefore the nucleus is sulphur-32