11. what are transition metals?
o elements that are in group 18
o elements with characteristics similar to metals, except when exposed to high heat
o elements that are poor conductors of heat and electric current
o elements that fall between those on the left and right sides of the periodic table

Elements that fall between those on the left and right sides of the periodic table

Explanation:

Transition metals:

These are present at the center of periodic table.

These are d-block elements.

They include the elements of group 3 to 12 in periodic table.

They have large charge to radius ratio.

They mostly form paramagnetic compounds.

They shoes more than one oxidation state.

They form colored compounds.

They all have high melting and boiling point.

They have high densities.

They form stable complexes.

The elements of f-block are also transition but they are called inner transition.These are consist of two series lanthanide and actinides.

the answer is c. nacl