Crossword-Solution: SCANDIUM 8 letters, 19 clues 🏆 scrabble score: 13

Mendeleeff gave the discovery fullest expression, explicating it in 1869, under the title of "the periodic law." Though this early exposition of what has since been admitted to be a most important discovery was very fully outlined, the generality of chemists gave it little heed till a decade or so later, when three new elements, gallium, scandium, and germanium, were discovered, which, on being analyzed, were quite unexpectedly found to fit into three gaps which Mendeleeff had left in his periodic scale.

For instance it was in this way that Mendeléef, the Russian chemist, assumed the existence of three then unknown chemical elements, now called Scandium, Gallium and Germanium.

Its group members, scandium and yttrium, have the same form; we have not examined the fourth; the group is positive.

NITROGEN: Balloon 110 Oval 63 2 bodies of 20 atoms 40 2 " " 24 " 48 ---- Total 261 ---- Atomic weight 14.01 Number weight 261/18 14.50 VANADIUM (Plate XII, 2) closely follows scandium, having two types of funnels.

VANADIUM: 3 funnels (A) of 160 atoms 480 3 " (B) " 137 " 411 Central globe 27 ---- Total 918 ---- Atomic weight 50.84 Number weight 918/18 51.00 NIOBIUM (Plate XII, 3) is as closely related to yttrium as is vanadium to scandium.