Answer:
A
particle is a high energy electron
Step-by-step explanation:
particle :
The energy and speed of the
particle is very high.
Beta particles are emitted by the radioactive decay of the atomic nucleolus.
When an electron is emitted then it is denoted by
and when a positron is emitted then it is denoted by
![\beta ^+](https://img.qammunity.org/2020/formulas/physics/high-school/p62oqovm1bm7u9ziz3eva7j0ypdb9p80xf.png)
The energy of the
particles is very high