الإنجليزية - الإنجليزية
تعريف ekaboron في الإنجليزية الإنجليزية القاموس.
- the name given by Dmitri Mendeleev to the predicted element (scandium) lying below boron in the periodic table
- The name given by Mendelejeff in accordance with the periodic law, and by prediction, to a hypothetical element then unknown, but since discovered and named scandium; so called because it was a missing analogue of the boron group