Properties of nickel  as a transition element

Properties of nickel  as a transition element

1. Forms colored compounds; for instance Ni²⁺ is green
2. Has variable oxidation states; +2, +3,
3. Forms complexes, e.g. Ni(NH₃)₆²⁺.
4. Catalytic property: it is a catalyst in hydrogenation of alkenes, alkyne

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