The nuclear equation :
₈₈Ra²²⁸ ⇒ ₋₁e⁰ + ₈₉Ac²²⁸
Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,
The sum of the mass number and atomic number before and after decay is the same
Ra = Radium ⇒alkaline earth, group 2, block s, period 7
Atomic mass = 88
If an element releases an β ₋₁e⁰, the atomic number of the new element increases by 1
The new element will have an atomic number: 88+1=89 and mass number 288
The element having the atomic number 89 is Actinium(Ac)
So the nuclear equation :
₈₈Ra²²⁸ ⇒ ₋₁e⁰ + ₈₉Ac²²⁸
