31. As an alkali metal , it has one valence electron. 32. The normal pressure " sodium arsenide " phase is adopted by many alkali metal pnictides. 33. Ketyls can be formed as radical anions by one-electron reduction of carbonyls with alkali metals . 34. Saltiness and sourness are perceived when alkali metal or hydrogen ions enter taste buds, respectively. 35. Silicon dioxide is acidic, and thus the alkali metal hydroxides can also attack silicate glass. 36. Other alkali metal bromides also allow the reaction and the formation of filamentous carbon to occur. 37. Decomposition of concrete and volatilization of the alkali metal compounds consumes a substantial amount of heat. 38. Like other alkali metal chalcogenides, Rb 2 Te is prepared from the elements in liquid ammonia. 39. In the solid alkali metal salts, the croconate anions and the alkali cations form parallel columns. 40. The number of states of rare gas halides is greater than that of alkali metal salts.
