KnowledgeBoat Logo

Physics

A certain nucleus A (mass number 238 and atomic number 92) is radioactive and becomes a nucleus B (mass number 234 and atomic number 90) by the emission of a particle.

(a) Name the particle emitted.

(b) Explain how you arrived at your answer.

(c) State the change in the form of a reaction.

Radioactivity

37 Likes

Answer

(a) The particle emitted is α-particle.

(b) As the atomic number is decreased by 2 and the mass number is decreased by 4 hence, we can say that an α-particle is emitted.

(c) This change can be expressed in the form of a reaction as follows:

92238A⟶90234B+ 24HeParent nucleusDaughter nucleus(α-particle)\begin{matrix} _{92}^{238}\text{A} & \longrightarrow & _{90}^{234}\text{B} & + & \space _{2}^{4}\text{He} \ \footnotesize{\text{Parent nucleus}} & & \footnotesize{\text{Daughter nucleus}} & & \footnotesize{\text{(α-particle)}} \end{matrix}

Answered By

22 Likes

Related Questions