A `beta-` particle is emitted by a radioactive nucleus at the time of conversion of a:

Options

A. Neutron into a proton
B. Proton into a neutron
C. Nucleon into energy
D. Positron into energy

Answer

A

Explanation

In a incleus, when a neutron is converted to proton `beta ^(-)` is emitted.
Nuclear reaction is given as
`n _(0) ^(1) to p _(1) ^(1) + beta _(-1) ^(0)`
When proton is converted to neutron, positive beta decay takes place.
`p _(1) ^(1) to n _(0) ^(1) + beta _(+1)^(0).`