Meaning of potassium-40 | Babel Free
Definitions
A naturally-occurring radioactive isotope of potassium, ⁴⁰₁₉K, having 19 protons and 21 neutrons, and a half-life of 1.3 billion years; it is the chief source of natural radioactivity in living tissue
uncountable
CEFR level
C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.
This word is part of the CEFR C1 vocabulary — advanced level.