Why is CaF2 not a molecular formula?
Which of the following is not an example of a molecular formula?
a.
H2O
c.
CaF2
b.
NH3
d.
O2

The answer is C and I am confused as to why.

Question

Why is CaF2 not a molecular formula?
Which of the following is not an example of a molecular formula?
a.
H2O
c.
CaF2
b.
NH3
d.
O2

The answer is C and I am confused as to why.

anonymous · Answer

CaF2 is an ionic compound, since its the only substance in ur group that is formed with a non-melta and a metal

anonymous · Answer

this link should help: http://wiki.answers.com/Q/What_is_the_difference_between_an_ionic_and_a_molecular_compound

anonymous · Answer

however that is a very condensed review I recommend this book: Chemistry, A central Science

anonymous · Answer

Oh, I see. Thank you!

anonymous · Answer

The fastest way to tell the difference between a molecular formula and a formula unit is to look at the composition of the particle.  If the elements are both nonmetals, it is a molecule.  If the elements contain a metal, it is ionic.  C has the only instance of a metal and a nonmetal; thus it is an ion.