What is the highest oxidation state exhibited by group 17 elements ?

What is the highest oxidation state exhibited by a 3d element ?

What is the highest oxidation state exhibited by a lanthanide element ? Name one element exhibiting this.

Oxidation state exhibited by group 13 elements is ___________

Highest oxidation state exhibited by a lanthanide element is

Highest oxidation state exhibited by a lanthanide element is

Highest oxidation state exhibited by a 3d-metal is

The highest oxidation state exhibited by a transition elements is _______.

The highest oxidation state exhibited by a transition elements is _______.

What is the highest oxidation state shown by a transition element.