Input interpretation
alkali metals | radioactivity
Radioactivity rankings
1 | francium | 5.3×10^-4 Bq (based on 1 values; 5 unavailable)
Unit conversion for highest radioactivity 5.3×10^-4 Bq
1.4×10^-14 Ci (curies)
Comparisons for highest radioactivity 5.3×10^-4 Bq
≈ ( 0.01 ≈ 1/91 ) × radioactivity of Radium in 1 gram of soil ( ≈ 0.05 Bq )
≈ ( 0.02 ≈ 1/48 ) × radioactivity of Uranium in 1 gram of soil ( ≈ 0.02 Bq )
≈ ( 0.033 ≈ 1/30 ) × radioactivity of radium-226 in 1 gram of limestone ( ≈ 0.016 Bq )
Corresponding quantities
Mass m of ^137Cs from m = m_aτA with m_a≈137u: | 164 fg (femtograms) | 1.6×10^-16 kg (kilograms)
Absorbed dose rate D^. resulting from ^138Cs point source 1 meter away: | 1.6×10^-15 mGy/h (milligrays per hour)
Count rate: | 0.032 counts per minute