The third transition series metals are shown below.
-Which has the lowest melting point?
A)La
B)W
C)Os
D)Hg

Question

The third transition series metals are shown below. 
-Which has the lowest melting point?
A)La 
B)W 
C)Os 
D)Hg

Quizplus · Accepted Answer

The element with the lowest melting point in the third transition series is Hg (Mercury) with a melting point of -38.83°C. Both La and W have high melting points of 920°C and 3422°C, respectively. Os has a very high melting point of 3033°C making it the element with the highest melting point in the periodic table. Therefore, the best choice for the lowest melting point in the third transition series is option D, Hg.

The Third Transition Series Metals Are Shown Below