# Is electron capture partially responsible for matter decay?

Sorry for the very likely ill-posed question. I have lately started reading a lot about quantum physics and the nature of electrons and I read about a phenomenon known as "electron capture" which can happen with a finite probability when an electron "finds" itself within the nucleus volume.

If an electron capture converts a proton and an electron into a neutron plus the emission of an electron neutrino, does this mean that all matter can "decay" with time?

I hope my question is clear enough for someone more expert than me to answer it. Thank you again for your time!

• Electron capture only can happen when energetically favorable. For any stable isotope it isn’t. – Jon Custer Sep 2 '19 at 20:26
• Electron capture happens only to atoms whose nuclei have "too many" protons (as compared to the number of neutrons). – Thomas Fritsch Sep 2 '19 at 20:34

$$^{26}_{13}Al + e^{−} \rightarrow ^{26}_{12}Mg$$