What transition metal ions form without oxidant in water pH 7? [closed]








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I am not sure how many transition metals will ionize without oxidants, where could I learn this? 




If you are counting lanthanides as "transition metals", then look at europium whose reactivity with water is [similar to calcium](https://en.m.wikipedia.org/wiki/Europium). Although the product listed in the reference is the trivalent hydroxide $\ce{Eu(OH)3}$, europium has a relativy stable +2 oxidation state and so the reaction msy proceed via a relatively soluble divalent hydroxide or cation ($\ce{Eu(OH)2, Eu^{2+}}$). The combination of a highly electropositive element, possibly with formation of a relatively soluble, low oxidation state hydroxide/cation makes europium more reactive to water than most transition metals.


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