de heliumisotopen (n)
― FormOf ⟶
Weight: 1.0
de heliumisotop Source: English Wiktionary
de heliumisotops (n)
― FormOf ⟶
Weight: 1.0
de heliumisotop Source: English Wiktionary
de heliumisotope (n)
― FormOf ⟶
Weight: 1.0
de heliumisotop Source: English Wiktionary