Isotopes
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What this model shows
Heavy water is real but costly, and it isn’t safe to drink in large amounts. Anhydrous copper(II) sulfate is harmful. So this experiment is virtual, or a teacher’s demonstration.
The masses in the card come from the densities at 20 °C: 0.998 g/cm³ for ordinary water and 1.105 g/cm³ for heavy water. The tilt of the beam shows only which side is heavier, not by how much.
Heavy water reacts a little more slowly in some reactions, so “the same chemical properties” means the same reactions and the same test results, not exactly the same speeds. The molecules in the magnifiers aren’t to scale, and their colours are only labels. The waits are shortened.
With reduced motion, each step finishes at once.
Select a piece of equipment, on the bench or here, to read about it in the card.