Which one of the following elements shows maximum number of different oxidation states in its compounds?
A.
$$Eu$$
B.
$$La$$
C.
$$Gd$$
D.
$$Am$$
Answer :
$$Am$$
Solution :
Oxidation states shown by elements are as follows:
$$La$$ = + 3
$$Eu$$ and $$Gd$$ = +2 and +3
$$Am$$ = + 2 + 3 + 4 + 5 and + 6
$$Am$$ shows maximum number of different oxidation state due to its larger size and low ionisation energy.
Releted MCQ Question on Inorganic Chemistry >> D and F Block Elements
Releted Question 1
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is