[siewwen168 (OP)]

Hello everyone.I wanna ask something about chemistry.[]

Is there a method to determine how many oxidation states that an element can exist?normally those can have more than one oxidation states is from the D-block element,such as copper(+2,+3) and titanium(+1,+2,+3,+4) and so on.[][]

I have no idea how to find out the number of oxidation states that an element can exist,for example nikel,is there anyone can help?[]

[Chemistry4me]

Is there a method to determine how many oxidation states that an element can exist?

No, you just have to remember them!

[lightarrow]

such as copper(+2,+3) and titanium(+1,+2,+3,+4)

No. Copper (+1,+2), Titanium (+2,+3,+4).

[Bored chemist]

IIRC Copper(III) does exist in a few obscure compounds.
BTW, why does everyone miss out zero as an oxidation state?
The elements are in a zero oxidation state (of course) but things like Ni(CO)4 (nickel carbonyl) and such have a zero oxidation state but are fairly stable compounds.
In some cases you can even get metals in negative oxidation states.

(Oh dear! I probably justr put someone off chemistry for life)