Assertion: proton's life | /r/HasProperty | a gives
Facets:
Source sentences:
text: Technetium-99m (the ‘m’ refers to the nucleus being in a metastable state) is used in medical diagnosis as a gamma ray sources because it has a half life of 6 hours which is a gives enough time for the measurements to be taken in hospital before the activity of the technetium decays away.