First slide

Radio activity

Question

During a negative beta decay

Easy

A

An atomic electron is ejected
B

An electron which is already present within the nucleus is ejected
C

A neutron in the nucleus decays emitting an electron
D

A part of the binding energy is converted into electron

Solution

Negative $β$ -decay is expressed by the equation
$n = p^{+} + e^{-} + v^{-}$
.

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