Question

A sample of which radioisotope emits particles having the greatest mass?1) Cs-1372) Fe-533) Fr-2204) H-3

Answer 1

3) Fr-220

It emits alpha particles which is the heaviest particle emitted by the radioisotopes listed.

Answer 2

Answer: Option (#) is the correct answer.

Step-by-step explanation:

Particles emitted by the given radioisotopes are as follows.

• Cs-137

`^(137)_(55)Cs \rightarrow ^(0)_(-1)e + ^(137)_(56)Ba`

A beta particle is emitted by Cs-137

• Fe-53

`^(53)_(26)Fe \rightarrow ^(0)_(+1)e + ^(53)_(25)Mn`

A positron is emitted by Fe-53.

• Fr-220

`^(220)_(87)Fr \rightarrow ^(4)_(2)He + ^(216)_(85)At`

An alpha particle is emitted by Fr-220

• H-3

[tex]^{3}_{1}H \rightarrow ^{3}_{2}He^{1+} + e^{-}/tex]

Thus, we can conclude that Fr-220 radioisotope emits particles having the greatest mass.