Examlex
Determine the identity of the daughter nuclide from the electron capture by Pa.
Environmental Pollution
The contamination of the natural environment by harmful substances or energies, leading to adverse effects on living beings and ecosystems.
Amateur Stargazing
The hobby or activity of observing stars and other celestial bodies for pleasure without professional equipment or knowledge.
Astronomy
The scientific study of celestial bodies such as stars, planets, comets, and galaxies.
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