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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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Apply: alpha, beta, and gamma decay

Google Classroom
You might need: Periodic table

Problem

The isotope magnesium-23 is used to study the energy produced when electrons and anti-electrons annihilate each other.
These bubble chamber tracks show antimatter, matter, and gamma radiation interacting.
Electron and positron tracks in a bubble chamber
It decays by the following equation:
A1223A212223Mg→A1123A211223Na+A+10A2+120e+νe
What type of decay is represented by the equation above?
Choose 1 answer: