Answer:
Chromium (Cr) is a transition metal
Explanation:
Transition metals are a series of elements present in the center of the periodic table. They are also referred to as the 'd-block' elements as it is the d-orbital that gets progressively filled with electrons with the increase in atomic number.
Based on the given examples:
1) Francium (Fr) is an alkali metal: group 1
2) Beryllium (Be) is an alkaline earth metal: group 2
3) Chromium (Cr) is a transition metal : group 6
4) Gallium (Ga) is a post-transition metal: group 13
5) Bismuth (Bi) is also a post-transition metal: group 15
