Zeptogram (zg, zgs)
Zeptogram (zg, zgs) :
The prefix "zepto" means 1/1,000,000,000,000,000,000,000 = 1e-21, so 1,000,000,000,000,000,000,000 zg = 1e+21 zg = 1 g. 1000 zg = 1 attogram. 1 zg = 1e-24 kg. For comparison, one atom of platinum weighs approximately 3.02e-22 g so 3 atoms of platinum weigh roughly 1 zeptogram. See: Atomic Mass Unit
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