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Course: High school chemistry > Unit 9

Lesson 1: Radioactive decay
Science
High school chemistry
Nuclear chemistry
Radioactive decay
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Problem

Carbon-11 is a radioisotope that decays by emission of a positron. The first evidence of positrons was discovered at Caltech by the scientist Chung-Yao Chao in 1930.
While working with thalium-208 at Caltech in 1930, Chung-Yao Chao first discovered evidence of positrons.
Chung-Yao Chao
When C-11 undergoes beta plus decay, what is the identity of the daughter isotope?
Choose 1 answer: