An element belongs to group 9. what common name might be used to describe the group to which this element belongs?

Explanation:

According to the periodic table chart, elements present in groups 3 to 12 are placed at the center.

These elements are known as d-block elements and all these elements are metals. General electronic configuration of d-block elements is .

These d-block elements are also known as transition elements. For example, elements of group 9 are Co, Rh, Ir etc.

Therefore, we can conclude that common name which might be used to describe the group to which this given element belongs is transition metals.