Question

Two protons and two neutrons are released as a result of this reaction.

Answer 1

Answer:

The answer is A

Explanation:

Answer 2

Answer: The particle released in the given reaction is one alpha particle

Explanation:

In a nuclear reaction, the total mass and total atomic number remains the same.

For the given fission reaction:

$^{222}_{86}\textrm{Rn}\rightarrow ^A_Z\textrm{X}+^{218}_{84}\textrm{Po}$

• To calculate A:

Total mass on reactant side = total mass on product side

222 = A + 218

A = 4

• To calculate Z:

Total atomic number on reactant side = total atomic number on product side

86 = Z + 84

Z = 2

The isotopic symbol of unknown element is $_{2}^{4}\textrm{He}$. Another name of helium atom is alpha particle.

Hence, the particle released in the given reaction is one alpha particle