- Rare earth metals
- found: Emsley, J. Nature's building blocks, 2011 (Scandium; Sc. When Dimitri Mendeleyev devised his periodic table of the elements in 1869 he noticed that there was a gap in atomic weights between calcium (40) and titanium (48) and he predicted that there should be another element of intermediate atomic weight (44) which he referred to as eka-boron, since he thought it would come below boron in the same group III of his table. Scandium was discovered 10 years later. This was the missing eka-boron predicted by Mendeleyev; scandium is a soft, silvery, yellow-white metal and a member of group 3 of the periodic table)
- found: The Merck index, 2001 (Scandium. A rare earth metal. Predicted and called "ekaboron" by Mendeleev)
- 1986-02-11: new
- 2013-01-24: revised
The LC Linked Data Service welcomes any suggestions you might have about terminology used for a given heading or concept.
Would you like to suggest a change to this heading?
Please provide your name, email, and your suggestion so that we can begin assessing any terminology changes.
Fields denoted with an asterisk (*) are required.