Question

An atom of Astatine-214, 21485At, undergoes alpha-decay. Using the chart above, what new isotope will be produced?

Answer 1

`Bismuth-210\text{ -}__{_(83)}^(210)Bi`

Explanations:

If the atom of Astatine-214 undergo alpha particle, it will emit helium element as shown;

`_(85)^(214)At\rightarrow_(83)^(210)Bi+_2^4He`

According to the decay, 4 is subtracted from the mass number and 2 from the atomic number.

According to the reaction, the new isotope produced is Bismuth-210