11. Scandium atoms reside in the voids of the boron framework.12. Scandium hydride with increased hydrogen content can be made harder than scandium.13. Scandium hydride with increased hydrogen content can be made harder than scandium . 14. The properties of scandium compounds are intermediate between those of aluminium and yttrium. 15. Scandium has no biological role, but it is found in living organisms.16. Concentration dependent activation-energies are observed for hydrogen diffusion in scandium metal. 17. Scandium triflate is used as a reagent in organic chemistry as a Lewis acid.18. Scandium allows for smaller-diameter tubes on bike frames, which means less weight.19. These alloys contain between 0.1 % and 0.5 % of scandium . 20. Lacrosse sticks are also made with scandium .