Answer: the correct answer is (A).
Explanation:
Structural formula not only tells us about the number and types of atoms in a molecule but also tells us about the bonded positions of all the atoms in a molecule of that particular compound.
Molecular structure only tells us about the numbers of atoms and types of atoms present in a molecule of that particular compound.
For example: Molecular formula of propanone and propanal are same that is
but structural formula is different that
for propane and
for propanal. Here structural formula is showing that how the atoms in propanone and propanal are bonded together.
Hence, the correct answer is option (A).
True because solids are colder so the particles are in a fixed pattern that join them into a regular pattern