Question

Pu-238 (Plutonium, 238) decays by α emission to form an atom, which atom is this?

Answer 1

Helium atom

Step-by-step explanation:

For the RTGs flown by the United States, the radioisotope has been some chemical form of plutonium-238 (238Pu or Pu-238). Plutonium-238 decays primarily by the emission of an alpha particle (a helium atom without its electrons).