Answer to Question #99346 in General Chemistry for David

Question

What are these radioactive emission
1. positron
2.antineutrino
3.neutrino
4.electron

Answer 1

1.      In positron emission a proton inside a radionuclide nucleus is converted into a neutron while releasing a positron and an electron neutrino. Also called beta plus decay.

2.      antineutrino emission accompanies emission of a positron from a nucleus. The antineutrino is an elementary subatomic particle with infinitesimal mass and no electric charge.

3.      Neutrino emission accompany a positron. A neutrino is an almost massless and chargeless particle.

4.      Electron emission is an emission induced by an electrostatic field. An electron escapes from a metal surface in this emission.