Radium-226 Decays into Radon-222 Plus an Alpha Particle ${ } _ { 2 } ^ { 4 } \mathrm { He } : \quad 4.002603 \mathrm { u }$

question 113

Multiple Choice

Radium-226 decays into radon-222 plus an alpha particle. The relevant masses are ${ } _ { 2 } ^ { 4 } \mathrm { He } : \quad 4.002603 \mathrm { u }$
$\begin{array} { l l } { } _ { 86 } ^ { 222 } \text { Rn: } & 222.017570 u \\ { } _ { 88 } ^ { 226 } \text { Ra: } & 226.025402 u \end{array}$
How much energy is released in this process? $\left( 1 \mathrm { u } = 931.5 \mathrm { MeV } / \mathrm { c } ^ { 2 } \right)$

• A) \(4.87 \mathrm { MeV }\)
• B) \(5.39 \mathrm { MeV }\)
• C) \(3.76 \mathrm { MeV }\)
• D) \(5.05 \mathrm { MeV }\)
• E) \(4.24 \mathrm { MeV }\)

---

Definitions:

Organisational Design

The process of shaping an organization's structure and roles to align with its objectives, strategy, and environment.

Additive Alleles

Alleles that contribute to the phenotype in an additive manner, where the effect of multiple alleles simply adds up.

Dominant Alleles

Alleles that express their phenotype even when paired with a different allele in a heterozygous genotype.

Recessive Alleles

Genetic variants that must be inherited from both parents to be expressed in the offspring; not expressed when a dominant allele is present.