Question

Which nucleus completes the following equation?

Answer 1

B. 208 84 Po

Step-by-step explanation:

got it right, trust

Answer 2

`_(84)^(208)Po`

B is correct.

Step-by-step explanation:

Given the equation

`_(86)^(212)Rn\rightarrow_(2)^(4)He`

According to alpha emission

Alpha emission is a radioactive decay in which the atomic nucleus emit the alpha particle and formed a new nucleus whose mass number reduced by four and atomic number reduced by two.

Therefore,

Po is the new nucleus.

`_(86)^(212)Rn\rightarrow_(2)^(4)He+_(84)^(208)Po`

Where, Rn = Radon

Po= polonium