medium, MnO 4
-
+ 3 e- + 2 H 2 O
MnO 2 + 4OH- 14. Properties of Lanthanoids and Actinoids.
Lanthanoids Actinoids
+ 3 oxidation state is most common
along with + 2 and + 4
Actiniods also show higher oxidation
states such as + 4, + 5, + 6 and + 7.
They are more reactive
Except Promethium, they are non –
radioactive.
They are radioactive
The magnetic propertie s of lanthanoids are less complex than
actinoids.
The magnetic properties of the
actinoids are more complex than
those of the lanthanoids
15. Mischmetall- It is a well known alloy which consists of a lanthanoid metal(~ 95 %) and iron(~ 5 %) and traces of S, C, Ca and Al. A good deal of mischmetall is used in Mg-based alloy to produce bullets, shell and lighter flint.