Radium-226 Decays into Radon-222 Plus an Alpha Particle ${}^{4}_{2}$ He: 4002603 U

question 154

Multiple Choice

Radium-226 decays into radon-222 plus an alpha particle.The relevant masses are ${}^{4}_{2}$ He: 4.002603 u ${}^ { 222 }_ { 86 }$ Rn: 222.017570 u $^{226}_{88} Ra$ : 226.025402 u How much energy is released in this process? (1 u = 931.5 MeV/c²)

• A)4.24 MeV
• B)3.76 MeV
• C)4.87 MeV
• D)5.05 MeV
• E)5.39 MeV

Analyze the effects of non-native species on native communities.

Comprehend trophic relationships and their effects on community structure.

Describe the roles of keystone and foundation species in ecosystems.

Understand the principles of ecosystem engineering and its impacts on habitats.

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