Question

The boron isotope decays into the carbon isotope . What kind of particle is emitted in the decay?

a. A beta particle is emitted.

b. An alpha particle is emitted.

c. A gamma ray is emitted.

d. A positron is emitted.

Answer 1

Boron - 11 decays to Carbon - 11 by $\beta$ ^- decay.

In $\beta$ ^- decay, a neutron decays to produce a proton, an electron and an anti neutrino.

An electron or positron emitted in $\beta$ decay is called a beta particle.

Here, an electron is emitted.

So, option A is correct.