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Apply: alpha, beta, and gamma decay

You might need: Periodic table

Problem

The radioisotope magnesium-23 is used to study the energy produced when electrons and anti-electrons annihilate each other.
Electron and positron tracks in a bubble chamber
It decays by the following equation:
A1223A212223MgA1123A211223Na+A+10A2+120e+νe
What type of decay is represented by the equation above?
Choose 1 answer: