The highest oxidation state in 3d series is shown by an element with atomic number ___________.

There are  __________ elements belonging to 3d series.

A.

B.

C.

D.

E.

A.

B.

C.

D.

E.

The general configuration of the last two energy levels of d-block elements is __________.

The most stable oxidation state for lanthanides is _________.

Colour exhibited by the transition element cations in the _________ of the absorbed wavelength.

An atom with atomic number 21 belongs to the category of

• s-block elements

• p-block elements
• d-block elements
• f-block elements

Lanthanoid contraction results in the comparable ________ of Zr and Hf.

Transition elements are

• s-block

• p-block

• d-block
• None of the above
• None of the above