Question

which of these is a transition metal? potassium, k strontium, sr tungsten, w fluorine, f

Explanation:

Transition metals are elements in the d - block of the periodic table. Potassium (K) is an alkali metal (s - block), strontium (Sr) is an alkaline earth metal (s - block), fluorine (F) is a non - metal (p - block). Tungsten (W) is in the d - block of the periodic table.

Answer:

tungsten, W