Answer:
Cu
Explanation:
From the given choices only Copper is considered a transition element.
Transition elements are found between the groups IIIB - IIB on the periodic table.
These elements are also said to be d-block elements.
- Copper is the 29th element on the periodic table of elements
- It belongs to the first row of the transition elements.
- Fluorine is in the p-block and a member of the halogen
- Tin is the 5th group
- Na is an alkali - metal
