<P> Most of the chemistry has been observed only for the first three members of the group . The chemistry of seaborgium is not very established and therefore the rest of the section deals only with its upper neighbors in the periodic table . The elements in the group , like those of groups 7 -- 11 , have high melting points , and form volatile compounds in higher oxidation states . All the elements of the group are relatively nonreactive metals with a high melting points ( 1907 ° C , 2477 ° C , 3422 ° C ) ; that of tungsten is the highest of all metals . The metals form compounds in different oxidation states : chromium forms compounds in all states from − 2 to + 6 : disodium pentacarbonylchromate , disodium decacarbonyldichromate , bis ( benzene ) chromium , tripotassium pentanitrocyanochromate , chromium ( II ) chloride , chromium ( III ) oxide , chromium ( IV ) chloride , potassium tetraperoxochromate ( V ) , and chromium ( VI ) dichloride dioxide ; the same is also true for molybdenum and tungsten , but the stability of the + 6 state grows down the group . Depending on oxidation states , the compounds are basic , amphoteric , or acidic ; the acidity grows with the oxidation state of the metal . </P>
8 ) what is the common characteristic of the group vi metal ions
high melting points form volatile compounds in higher oxidation states