How many molecules are there in FeF3

FeF3 is a molecule. In it there are 3 atoms of F and one of Fe.

n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

well in order to answer this question you have to provide more information < 3