During a particle-beam experiment, four nuclei each emit radiation once. Some of the information recorded after the emissions is missing.
Complete the missing entries in the table.
| Radiation emitted | Quantity before emission | Same quantity after emission |
|---|---|---|
| gamma | total number of protons and neutrons = 78 | ? |
| beta plus | number of protons = 12 | ? |
| neutron | total number of protons and neutrons = 9 | ? |
| beta minus | number of protons = 26 | ? |