How does a molecular compound compare to the elements that make up the compound?

The only difference between a molecular compound and an element is that in an element all the molecules are the same, but in a molecular compound there are different types of elements that make up the compound.

So an element is something you find on the periodic table, a molecular compound is created using different types of elements.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

c should be the answer