Which characteristic is NOT typically associated with transition elements?

Transition elements, which are found in the d-block of the periodic table, are known for several distinctive characteristics that relate to their electronic structure and bonding capabilities. The correct choice is linked to the properties commonly attributed to these metals.

High melting points, the ability to form salts with halogens, and paramagnetism are indeed characteristics associated with transition elements. Most transition metals exhibit high melting points due to strong metallic bonding; they readily form halides when reacting with halogens, showcasing their capability to lose electrons from both their outermost and penultimate electron shells; and many possess unpaired d-electrons, making them paramagnetic.

In contrast, low density is not a typical characteristic of transition metals. Many of these elements have relatively high densities as a result of their closely packed atomic structures and substantial atomic weights. Thus, low density does not align with the physical attributes generally observed in transition elements.