If Astatine-207 Decays by Two ? Emission Followed by an Electron

question 72

Multiple Choice

If astatine-207 decays by two ? emission followed by an electron capture, what is the product nucleus? (Atomic number of astatine = 85)

• A) \({ } _ { 80 } ^ { 199 } \mathrm { Hg }\)
• B) \({ } _ { 82 } ^ { 203 } \mathrm {~Pb}\)
• C) \({ } _ { 82 } ^ { 199 } \mathrm {~Pb}\)
• D) \({ } _ { 80 } ^ { 203 } \mathrm { Hg }\)
• E) \({ } _ { 81 } ^ { 198 } \mathrm { Tl }\)

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