A nucleus of uranium-235 (92235U\text{}^{235}_{92}\text{U}92235U) undergoes a decay chain in which it emits four alpha particles and three beta-minus particles to form an isotope of francium (Fr\text{Fr}Fr).
What are the nucleon number A A\,A and the proton number Z Z\,Z of the resulting francium nucleus?
A=219,Z=87A = 219, Z = 87A=219,Z=87
A=219,Z=81A = 219, Z = 81A=219,Z=81
A=219,Z=84A = 219, Z = 84A=219,Z=84
A=223,Z=89A = 223, Z = 89A=223,Z=89
