Deuterium is in some ways the opposite of helium-4, in that while helium-4 is very stable and difficult to destroy, deuterium is only marginally stable and easy to destroy.
Deuteris tam tikra prasme yra priešingybė heliui-4: jei helis yra labai stabilus, tai deuteris tik iš dalies stabilus ir lengvai suardomas.