Answer:
The answer to your question is below
Explanation:
Alpha decay occurs when a radioactive atm emits an alpha particle (Helium atom).
a) ²⁵⁶Ra ⇒ ²⁵²₈₄ Po + ⁴₂He
b) ²¹⁹Rn ⇒ ²¹⁵₈₂Pb + ⁴₂He
c) ²¹¹Po ⇒ ²⁰⁷₈₀Hg + ⁴₂Hg
d) ²¹⁰Pb ⇒ ²⁰⁶₇₈Pt + ⁴₂Hg
e) ²³⁸U ⇒ ²³⁴₈₈U + ⁴₂Hg
